I have had an ERCF v1 for a long time, and recently wanted to upgrade to the community run v2 version, which meant a bit of tweaking on my mounting system.
I tried a few options, but given my V2 has glass panels, I cannot easilly do a top entry bowden for my toolhead, so I've left it with the stock v2 exhaust entry for now, maybe going to a nevermore or something eventually. To get around the problem of the ercf being way too close the rear panel to flow smoothly, I created a taller and slanty version of the original spacers on the V1 design, and mounted my v2 to it. This solves the problem another design I tried had of printed parts alone not being quite strong enough to do the trick of holding the amount of weight, cantelevered off the back like that :P This design has a screw through it, so the metal is taking the majority of the force.
Its simple, and stupid, but it works, so I'll probably leave it here for now, I did make a mod to allow me to use misumi corners, but then I cant have my ercf on an angle, as they have keyed tabs on them. I just used a 3d printed openbuilds corner, but a metal one should work, and probablty better, I just didnt have any, and my originals from V1 have proven to be very robust, as long as you print with the lay lines in the right orientation.
I printed these with 55% infill, otherwise voron settings, and they are rock solid. I have 2.5mm thick back panels, if you want a different size let me know, its a trivial change to add different thicknesses.
The author marked this model as their own original creation.