Microswiss direct drive adapter for MP3DP v4

I have what used to be an Ender 5 Pro. One of the first ever mods I made when I got it was a Microswiss direct drive unit. Fast forward a couple of years, and about 6 months ago I wrapped up a build of an MP3DP v4.

I dig the CoreXY kinematics, and had been contemplating converting the Ender 5 to CoreXY. In fact I tried a few different CoreXY mods for the Ender 5. I didn't really like them, but I have a pretty decent handle on the MP3DP v4, and as I looked at the Ender 5, I realized that I've modded it enough that I could put the MP3DP CoreXY parts directly onto the Ender 5.

But what to do about a hot end? Obviously I could set the MSDD aside, and grab a Hemera like I have on my MP3DP, but that feels wasteful. [To be clear, there's a lot I like about the Hemera set up. And if this MSDD ever kicks it, that's what I intend to do.] So I made an adapter to hang off of the X carriage for the MP3DP.

Its a little thicker than I would have liked (12 mm), but there's a reason for that which I can't figure out how to work around.

The version in the photos is printed in PETG, 0.2mm layers, and 10% gyroid infill. No supports were required.

It is quite solid, and having used this MSDD for about 2 years now, I don't think I'll have issues with the adapter heating up.

Assembly:

1. Press some M5 nuts into the captive holes. They should be flush with the surface, or very close to it.
2. Press as many M3 nuts into the captive holes as you think you need. I used all 6, but it may be overkill.
3. Press the MSDD into the large cylinders on the same face as the M3 nuts. It is a tight squeeze, but they should fit. Press the MSDD into those as far as possible. It took a little force, but I managed to get those M5 bolt holes in the MSDD to go all the way into the holes.
4. Thread 2x 20mm M5 bolts into the face of the MSDD. They should thread right into the M5 nuts on the other side without any sticking out. I used button head cap bolts to keep the profile low on the face of the MSDD.
5. Line the MP3DP X carriage up with the holes in the adapter. Thread in 20mm M3 bolts. The holes in the adapter are tight, so you will likely need to thread the M3 into the adapter and then into the nut. Draw it in so that the adapter sits tight against the X carriage.

I've not completed the assembly on the printer yet, but I think it should be pretty solid. 

Also, it looks like I'll be able to the belt slots on the MSDD for the top belt, which I think may be a bit easier to deal with that the slots on the X carriage.