I'd venture a guess, but since I rarely use the stuff, it'd be pure speculation and the other guys like the above are way more knowledgeable about that stuff..
Any other discussion on AM parts is welcome!
Personally, I think that too many modelers are too dependent on AM parts, and scratch-building details and super-detailing is a dying art.. It DOES beg the question, are there AM parts FOR every model? I doubt it... Seems that AM makers focus on parts for the new higher-end kits these days (which begs another question, if they're supposed to be "better" as new high-end kits, why do they NEED new parts?) There was an ad for a 1/32 F-80 (think it's Czeck Model) I saw recently that had so many aftermarket parts for it that the total price for them was way more than the kit price of 80.00...
Don't get me wrong, I don't begrudge folks that depend on them, but I wish that they'd at least try to make some detail parts on their own before running to the PE/Resin rack... If a guy would spend the money needed for a couple large AM parts purchases on tools for scratch-building, like a Dremel, Pin vise & bits, vac-former, soldering iron, punch & die set, a vise or two, magnifiers, templates & stright-edges, a modest stock of styrene structural and strip/rod materials (or learn how to stretch sprue into various diameters), and a few "For Sale" signs for sheet stock, pretty much anything that a manufacturer puts out can be built on the bench. After all, 90% of everything in a cockpit, gunbay, or wheel well comes from the basic shapes of squares, rectangles, circles, cylinders, tubing, and triangles...
For instance, an instrument panel doesn't need to be a 12.00 piece of photo-etched brass. It can be made from styrene easily. Cut two panel shapes and drill the holes for the instruments and switches. Then either add a decal or needle-scratch the gauge faces into the first panel sheet, then glue the second over the top. Four pieces of sheet and three pieces of strip or rod become a throttle quadrant (Throttle, Mixture, & Prop levers) by sandwiching the stips into the sheet and mushrooming the strip with a lighter or soldering iron. Various diameters of solder & electrical wire are cables, wiring harnesses, fluid lines, & conduit... Everyone has junked electronic "stuff" that will supply a plethora of wires, large diodes are great for oxygen bottles, the limit is your imagination... Need a P&W R-2600 radial for that Hellcat or B-26? That's more than enough reason to buy some resin and RTV rubber... It'll cost about the same as ONE aftermarket resin engine in a bag and you can cast at least a dozen... Cast copies of the one from the Monogram P-61. And when you're casting parts, cast half a dozen, not just one... If you're like me at all, you'll eventually use them up... Oh yeah, cast copies of guns & figures too... I've got a bag of .30 & .50 cals, and flight crew figures from Monogram that I cast myself, mostly the TBD pilot, as well as some like the B-26 top turret gunner, Pro Modeler B-17 gunners, F-86, Me-262, F-5, B-25, SNJ/T-6 pilots, paratroopers from the C-47, and a few others from Tamiya and Verlinden.
Now I know that some folks will say that they "don't have time" to do all that part-hunting and casting/cutting/shaping/bending/sanding, but I don't buy that at all... No one has ever been banned from their bench for missing a "deadline" (unless they build models for a living).. Time is what we got a LOT of, unless your goal is to knock a kit out in two hours a day... When I read that someone has spent say, 6 months building a kit, I'd venture a guess that it actually took them about 20-30 hours in reality, were they able to devote their attention to it full-time, say, eight hours a day, rather than a few hours a week...
So, bottom line is that I feel that, although there are SOME instances where AM parts are a necessary evil because the kit needs more details and the needed parts are too complex for standard scratchbuilding techniques (like say, the canopy/nose on an HE-111 or main gear wheels/tires that have complex hubs and tread patterns, etc..), a great number of parts can come from YOU and that makes the model YOURS and yours alone...
But that's just me... I hated it when guys would look at my dioramas and say something like, "Oh yeah.. I see you used the set from Verlinden for that scene there, and that guy's from the Tamiya Infantry at Rest set over there... I see also that you used the main gear from True Scale."... Plus, when I became a "serious" modeler, there just flat wasn't any (or very few) after-market parts for ANYTHING out there... Had to buy a second TBD to get the .30 cal in order to make the proper "Two-gun" rear cockpit for a "Torpedo Eight at Midway" Devastator diorama because I didn't know how to cast parts then, and the nearest "real" hobby shop an hour (by car) away... Too far for me & my bicycle, lol...
Your mileage may vary...