i got the two handles. the farmertec 380 and the protools66 381. i have them marked in photo. i was correct in my assumptions so far. unfortunately it leaks at the fuel elbow on the 381 so i will have to deal with that first. the size difference is correct and will pull the side screw into view. i need to measure the carb box but from looking at it i think the box will allow the oem filter to sit with the nuts on the studs and pickup the shutter latch on the control bar correctly. my very old original handle is different from the current famertec handle. they are using the 381 style fuel hose. looking back into the model history they never used that type on the 038 or 380, used a one piece hose. and of course that's not a great way to prevent leaks is have 3 sections versus one piece. You can look down on the carb boxs in the photo and see the sections looks much different +
View attachment 656020 length.
to sum it up, the 381 handle should solve the problem, if i have guessed right it will. then by just buying the 381 handle you will not have this bad issue on the current or older kits. and if it works buying the 381 kit will give us a good 72cc kit that works like a good copy. its just too important for the filter shutter to work correctly. it looks like they used some of this and some of that to create that 380 kit. rather than having good copies like the others...overall, 660, 440 etc.
notice handle bar angle, i think an improvement