I got an ESCI jadgpanther and the link and length tracks on it were absolutely terrible! It was a total nightmare to put them on. the teeth on the drive wheels didn't fit the holes in the links. I wound up trimming all those little points with my trusty x-acto, both in thickness and profile. Also, the hub halfs don't have any locator pins on them and believe me, it's easy to not get those teeth aligned perfectly! The link and lengths that come in the Revell-Germany 1/72 kits I've built are terrific. But all the link and length type tracks are a bit fiddley. I think next time, I'm going to build the "link" parts up into a "length" against a straight edge, let them set up a bit, then bend them around the drive and idler wheels and finally attach them to the lengths that come with the kit.
I used Testor Model Master Steel (with flat black added) to paint a set of vinyls on a Hasagawa 1/72. I didn't have too much trouble with it. They did come out a bit streaky, but as I'll put a rusted patina over it, I wasn't to concerned with that. A neat rust coloring can be made by using Testor steel and mixing some burnt umber oil (no acrylic!!) artists paint into it. Mix just a tiny bit of the umber in at a time as it's really overpowering. You can use it as a full paint, or as a wash (I usually do a wash over a steel/black or all flat black base color) depending on the effect you're trying for, them drybrush a little straight steel then silver over the high points.
btw...don't get your screwdriver too hot as it's easy to melt right through the tracks! It's better to have to do a couple of melts rather than leave a gaping hole in the middle of your track!! ( voe -- voice of experience)
Good luck with your models.
Bill W.
Bill
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DML M4A2 Red Army
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-- There is a fine line between "hobby" and "mental illness". (Author unknown)