I noticed this conversation and thought I would add a few cents of my own. I do the alteration that Mark has mentioned by boring a hole down through the center of the drive to clear the adapter for the flexshaft. I actually altered the placement of the top two body screws to allow for that. I make a flat plate with keyholes for the mounting screws of the FE motor, which replaces the standard motor plate. Using this mod, you can use cut off flexshafts and a set-screw or collet-type driver, or, as Mark has indicated, use a square driver on your motor with short double-ended flexshafts. I have bought a few for testing from Hyperformance in California, where I get all my flexshafts. They are just about 4" long, which is (unfortunately) about 1/4" longer than Thunder Tiger flexshafts, which have been tested and did not work with this mod.. The special 4" long shafts work very well with Hyperformance's EOB35 square driver. Dave also sells a collet type driver, as does Zippkits. Just make sure you order the one that fits your motor shaft, usualiy 5mm. I think if you e-mail Hyperformance, you can just ask him for the 4" flexshafts that Fred got a while back. I will have some on order from Dave soon. Meanwhile, back at the propshaft end. I also have modified several drives for the OS propshaft. The 9mm left hand tap for that was very hard to find, I had to order it from a supplier in Japan. There is a trade-off using that mod on any two-piece drive body, like K&B and mine... you must also use a custom spacer to literally hold the drive halves together. The OS propshaft does not have any way to do that, as the K&B propshaft does. While you may not have noticed it, the undercut on the K&B propshaft body was put there specifically to hold the drive together. Without it, the sideways forces on the PS would push the drive apart and the PS would strip out the threads and fall out. Incidentally, Hyperformance ALSO sells a very good K&B style replacement propshaft for a price that is lower than Tower's price for an OS propshaft and you don''t need any spacer with it. Anyone wishing to buy a Lawless 3.5 drive with the center already bored out needs only to ask when making their order. There is a charge for the extra operation, but it includes the motor mount plate and the driver. If you already have a Lawless drive and want it modified, you can send it to me for the mod, driver and plate. If you are not sure you want to have the radical surgery done on your drive, I also offer an adapter that mounts on the drive in place of the usual motor plate and encloses the driver. It does raise the FE motor, but the overall height is only slightly more than a having a nitro motor on the drive. The lowered position of the motor on my drive does compensate somewhat for the slightly top heavy assembly. With that adapter, you still use standard 3.5-size flexshafts. (also available from me, or Dave).
Fred, the"Lawless Guy"