Story of woe with BIQU products:
Got a BIQU hotend & extruder combo - installed it on my Ender6
Went all-in with the H2V2S and Hermit Crab mounting system (non-CAN) - mostly optimized for the Ender3 series, but I figured the similarities would lead to me being able to use it. WRONG. I also got their probe.
TL;DR - H2V2S is an awesome design, but the 'grinding' is a fatal misalignment of the gearbox bearing and the shaft - walks over time. Hermit Crab quick change system is compatible only with Ender3 series. The microprobe is good. But to use any of these products, you need to be sharp.
Warranty/Tech Support? I've been told not to bother/save your breath. Wild West Chinese capitalism. It cost you near-nothing, deal with it or throw it away.
Remember - I got all 3 of these products for @ $160 on sale, DELIVERED. So, not a lot of money for a lot of learning.
The Good: The Microprobe
WARNING - you MUST have Klipper and be ADEPT at Klipper config programming to properly use this item!
WARNING - you MUST have a caliper and/or a machinists rule to properly calibrate your probe X-Y-Z offset (according to your pre-printed support).
WARNING -you MUST wire the Microprobe directly to the Ender6 Motherboard. You CANNOT wire it to the shitty extruder 'breakout board'.
I preprinted several mounts for the microprobe. I found several configs and programmed my Klipper.
Works great.
I previously used BL-Touch and CR-Touch and both failed due to the Ender6 design.
The Ender6 mounts probes NEXT TO THE EXTRUDER, inside a metal fan mount/metal shroud. Temps are VERY high and I found my BL and CR touch units partially melted. This caused crazy calibration issues - leading to 45minute recalibration sessions.
The Microprobe is lighter, more precise, and cheaper than any competition.
However, on the Ender6 you need to buy/make the longest probe cable you can find (on Amazon) and wire directly to the motherboard. The voltage on the breakout board is too low to support the Microprobe. Also - I routed my probe cable through the 20/20 extrusions - for sexy and cable length reasons.
The Bad: The H2V2S-
Installation of the H2V2S was easy-moderate. I'm a mechanically inclined professional, so take that as a precaution.
After @12 hours of printing, I started hearing a low grinding with some extrusion shorts. As the grinding increased, the shorts became more severe until layers were missing.
Cheap (chinese) bearings in the gearbox are either misaligned to the shaft, or the OD of the bearing recess allows the bearing to cant under load. When the bearing shifts, the extruder drive axle slips out of the drive-transmission.
I will attempt to correct by a drop of lock-tite along to outside of the bearing to freeze it in place and stop the movement.
The Ugly: The Hermit Crab; Quick Change System
I wish I could review this, but it is inncompatible and unusable with the exclusive support for the Ender3 series DESPITE advertising compatibility with the Ender6.
I had dreams of CNC and Laser Engraving with my Ender6. Now I can't see that happening.
The marketing material CLEARLY states compatibility with the Ender6. It isn't. No backplate, and the wiring exercise will be intense.
I'm not mad about the Hermit Crab gamble - eventually I'm sure I will get it installed (when I machine a backplate - eyeroll).