I got the plans from here
http://www.build-stuff.com/index.htm#Proto-Form%20Plans
I have talked to the guy on the phone before and emailed several times. Very nice fellow. He used to make an all metal version but it wasn't cost effective for him to produce outside of his business and the demand was too great to keep building them himself. At least that is what I remember.
The plans are okay, not engineering drawings (if that is what you are used to) There are several suggestions that I would make in constructing it to avoid the mistakes I made.
I will be sending him a marked up set of plans and suggestions once I am done.
All in all it looks really good. I just finished making the oven.
1. I have to put the close out trim on it and do the wiring.
2. Attach the switches/fuses and electrical plug
3. Finish the platen. (have to put formica on surface, form aluminum sheet and
drill holes in it) Then assemble the whole thing (put the plumbing etc on it and
attach to body of former.
4. Have the steel frame made (for holding the plastic sheets)
5. Buy a vacuumm pump. (little critters are pricey for a good one)
I will get some pic's later in the week I hope and post up what mine looks like.
Be prepaired for about 40-80 hours of work depending on your level of wood working skills, etc. Also, on how much time you can spend on the project as well as funds availability will determine when you finish as well. I think with plans and oven kit including all the supplies I bought (I bought upgraded stuff and added some other things to make mine a little better, modeler's just can't ever build right out of the box can we?
) I have spent around 400 dollars, not including a 300-400 dollar pump. Of course you can spend less if you don't upgrade as much or buy the best of the best in pumps.
Hope this helps, I will keep the forum updated on my progress. Next is to convert my pressure pot for painting into a vacuumm/pressure pot for mold making and resin casting.