Rotorhead67: Aren't you working on an IDF Sherman? If so, it's probably a large-hatch hull you'll need. Israel got a lot of Sherms from France -- I don't know much about IDF Shermans, but I did once build an M50 on an M4A1 hull with HVSS.
Plasticbattle: Yeah, I'm a member of the Yahoo Sherman group, but I'm more a lurker than a poster (where do you think I get all my information?

) -- some of those guys know a lot more than me. Missing Links also has some regulars that have spent a lot of time gathering info on Shermans. We're so lucky they are willing to share via the internet.
About the kit: No warpage on mine. I have a few friends that also bought the kit and all of them are happy with it, too. The attachments to the casting blocks are pretty thin and easy to cut. The only problem I had was cutting the pioneer tools off the slab. I was a little ham-handed and broke a couple handles, but once I settled down and took it a bit slower, they came off just fine. I cut the block apart with a razor saw, then gently whittled off the parts with a new Exacto blade. Clean-up was pretty easy on all the parts.
The sprue with the periscopes had a few bubbles in the corners that would be difficult to fill. I sent an e-mail to Rob Erwin at Formations and he sent me a new sprue right away and fo free. He even offered to send me an M4A2 kit postage-free. Cash was a little tight right then, so I passed, but he will definitely get my business in the future.
A few notes about the kit: The 8-page instruction sheet has big, clear diagrams if your references are a bit lacking, plus some tips. The bogies are sweet. They consist of a single-piece resin bogie truck and a resin skid plate. A piece of styrene rod is provided to attach the bogie arms. The donor suspension (use either Italeri or the DML clone) provides road wheels, bogie arms and springs. Also, I took a shortcut and used vent and fuel caps from plastic kits, but I could have used the resin parts. When you get done with this thing, you have lots of extra parts for the spares box.
I used the FineMolds PE set for the head and taillight guards. The fret can be seen in one of the pics. I really like this PE set -- it gives you enough parts to do two vehicles.