Anyone got a tip for installing the throttle cable through the slide return spring and getting the little square end ferule into place on a 38mm Delorto carb for an R90S? Seems like two hands are not enough. I made 4 attempts yesterday and couldn't get it. Made 4 more today and thought I had it but the square cable end did not seem to be properly seated. I poked at it with a small screw driver and it didn't move, so I thought I had it. But, the cable came out as I was inserting the slide into the carb body. I am thinking of making a simple spring compressor from a piece of all thread, then tie the coils down with 3 small wire ties. Any other ideas?