You sent me a custom hex. to try and correct the firing of the cannon movement (non servo) the first time with no sound. Finally had a chance to try it. I recently downloaded drivers on a new computer and all the tcb boards connect on various com ports. But when connected and after downloadingthe custom hex. and try flash it.. the tcb disconnects with "flash operation failed. Make sure you select correct port" On this board the only option is com 1 and 4 and 4 is the one it connects to but on trying to update with latest version or the custom hex. it disconnects? Would another version of the drivers perhapsfix this? Again, any changes can be made and downloaded after it connects, it's just the flash update.