Sometimes I need to go from tele (6.3mm) to mini tele (3.5mm), therefore I made two patches. One of these takes 6.3mm tele in, buffers it and sends it to two identical (yet unbuffered) 3.5mm tele. The other mixes two 3.5mm tele to one 6.3mm tele.
Unfortunately there are no building instructions for this module, but at least you'll find the schematic, some photos, and some comments.
6.3mm tele to 3.5mm tele patches.
That's it! Have fun and happy patching!