I have a 4006M that I'm thinking about getting a cab to use in winter conditions. Curtis Cab has theirs on clearance for $1500. That's for metal and glass all around. Regular price $4000+. The web site says it is for the "R" series but the pictures show it on a 4052M. The response to my inquiry advised that, yes, it will work on the "M" series but you can't use it with the loader. I started comparing the look of the R vs the M. The loader is the D170 instead of the H180 but they appear in the same place when mounted. The bucket control IS an issue but I'm guessing that could be relocated without breaking the bank considering the clearance price. I'm thinking any other minor modifications could be made and still be ahead of the game. I can't find ANY other information on the web or other forums or pictures of the Curtis Cab on a tractor of this series. Any information would be greatly appreciated. Thanks.