Originally Posted by
Cyco-Dude
the rt classic sears had a bearing where the sear pin went, and had carbide inserts where the sear contacted the on/off pin and bolt. while hard-wearing, the carbide was more brittle as a result. i've replaced a lot of rt classic sears that were chipped. if your rt classic needs a new sear, you can use the rt pro sear without issue. i have not noticed any issues with the rod length, but you would have to determine this based on the frame you are using. it's no big deal to adjust it if needed.
tunaman already covered the rail. you should be able to mill the front of the rail leaving the rear (with the air passages) alone, but that would have to be worked out with luke (or whoever you have milling the rail i guess). basically, anything around and behind the banjo bolt hole in the rail would be off-limits, but anything to the front of that would be ok.