Flex3Drive Dual mount for d-bot

An experimental merge of the D-Bot's E3D hot end carriage side bracket and a simple U shaped bracket to hold one of the excellent Flex3drive Dual remote direct drive units.

The first version without a BLTouch mount worked fine, but I had issues with a 330x330 bed D-Bot and leveling, and occasionally cooling parts hitting the top of the z-screws.

In the second version, I raised the flex3drive mount by 10mm as it gave me more Z movement, and meant my cooling wasn't going to hit the top of the Z screws. I also added a BLTouch. In Klipper, I use a z_offset of 0.38mm, and when I slide a thick sheet of paper underneath the nozzles they grab just a little. First layers go down like a dream.

I'm currently using a part printed in PLA at 80% infill with 5 perimeters, and it seems to be strong enough. I don't seem to get any ringing or other artifacts when printing as fast as 100mm/s. A PETG test print also produced a very strong part but I've not mounted it.

The easiest way to build