The original Hydra system wasn't built with ABL devices in mind, and had a Basic mount that works. The issue I had is the Hydra system is wide when you have the dual 5015 fan option, and adding a BL Touch wing to the outside of that limited parts of the bed you could probe, and potentially cause interference with the frame.

I had seen an earlier center of the fan mount for a BL Touch, but I did not like how much of the hot end cooling fan it covered. Taking advantage of the one sided nature of the 5015 fan, I put this on the right side fan mount point so the BL touch does not interfere with the parts cooling 5015 fan, and has a minimal impact on the hot end cooling fan.

Note: this was built around a 40x20 fan, and it has decent clearances. With a 40x10 fan, like the stock fan, it should not pose any interference to the hot end air flow.

As an idea of what this accomplished, the old BL touch mount was 30mm left, 60 mm in front of the hot end. The new mount is 16 mm right of hot end center, and 52 MM forward.

Creality

Ender 5

No

No

0.2

20