Yep home made and I have a couple of them. One for the narrower wheels, uhhh, I guess that is only the Emonda now, where I it wide enough to accept up to about a 30mm tire, pick shows 25mm in an Aeolus rim. You just need to make sure it is tall enough to allow the wheel to steady the bike, and wide enough to allow the spokes to clear.






The one in the pic above is is wide enough for a 38mm for sure, but maybe slightly larger, possibly up to a 40\42. I know a 29er 2.2 is to large. I used 3/4 pvc and glue everything together, but I also put small screws in them to just add additional strength. For the base, I just put end caps on them.