A couple of comments for you. First, you don't need to send flywheel, clutch, clutch bell and gears with the engine. They are not part of the engine. HPI only needs the engine stripped down to the output shaft. I think that the T-15 has the integral motor mounts so you are going to need some motor mounts as well. You can reuse the flywheel, clutch, clutchbell and gears with your new motor. Also it is NOT HPI's fault that you stripped out the engine mounting screw. HPI can't control if you use a dull driver or if you slip while removing the screw and strip the head. If they made the screws come out easier, people would be crying and wanting warranty returns for the engine loostening up (this does also happen). Stripped engine mounting screws is a fact of life for nitro engines. Just like broken parts and worn tires. If you have only one screw head that is broken off, remove the other 3 and remove the engine. Then take a pair of pliers and twist out the stub that should be sticking out of the engine mount. The only time you would be messed up is if the screw somehow sheared off even with the bottom of the engine mount and you can't grip it with pliers. If this has happened, you can simply buy a pair of $4.00 engine mounts that HPI sells and use the optional engine mounting holes in the engine block and chassis to re mount your engine.