Swapping enlargers is just not in the cards for me anytime soon with my primary unit. I have about a dozen neg carriers in four formats including a rare and expensive Xpan carrier, anti-newton glass, filed out for full frame, 5 lens boards, three for 50mm openings. Unless I could find a complete LPL 4500 VCCE B&W in the West, drive out to pick it up and check the alignment with my Versalab and then get it home feeling solid about it, we are talking a lot of money and a lot of time moving from one to the other.
At this point, if I am hell bent on getting better fine tuning out of my enlarger, I am better off spending a few hundred on some custom made machined adjustments for my 45MX rather than what would add up to thousands in messing around with swapping units and the associated down time.
Maybe down the road, but sure as hell not now....