Just to give you a sense of scale and practical constraints, here’s my Pro XXL sitting on the bench I built to size. I was also somewhat space constrained, but this is my third (or fourth?) iteration on a bench+enclosure and I’ve been bitten before by making it “just large enough”
I know the 4XXL has slightly different footprint than the Pro, but just by 1".
This is 59" wide, 51" deep (and enclosure is 39" tall above the bench surface)
The very first question you need to answer is whether you think you will (need to) build an enclosure around your machine in the long run. There is a 50/50 chance you will want to, for noise and dust containment. If you do plan to add an enclosure, the base surface needs to be wider than the machine footprint.
- you want to have enough margin/clearance on the left and right sides of the machine for maintenance/clean-up activities. On a 4XXL, you will need to re-tighten the vwheels from time to time, and not being able to comfortably fit your hand and tools on the sides is getting old quickly.
- in the back, very little margin is required, the machine won’t extend beyond the back plates
- in the front however, do keep some significant margin for two main reasons:
- this is where tool change happens, and in that position the router overhangs the front of the machine. If the front of the machine is right on the front of the bench, there will be a lot of “oops I dropped my endmill on the shop floor”, whereas having a little bench space there and some kind of cushion/foam will save the endmills
- the router and more importantly the dust shoe and dust hose extend beyond the front plates when in the front position. If you ever need to build and enclosure with doors, you will be happy the front of the enclosure does not extend in the air beyond the bench limit.