Hi Stephen, let me try to answer all best as possible as I’m learning / taking note as I move along here. I don’t know if I see any flex in the gantry as I just readjusted all of the eccentric nuts and it’s really nice and tight (considering there is amazing hold with the wheels being put into trust as well as radial stresses on the Z carriage!) Yes, could be better, but look what I’m hanging off of this thing! My selection of this router was easy as it was gifted to me otherwise I’d probably look into the one you mentioned before something like this but I’m very happy and still interested in seeing if the extra torque at lower rpms will be key to some of my cutting. Regarding the Z axis springs I tried two but too strong. Bent both longer and too strong still. I’m now using these two I had but when raised up barely they are buckling and taking zero load. I left machine on for long while and the stepper is barely warm at all holding that position too which again is testament to me of the amazing strength of these little motors!
Some info on the router here per your request from Rockler’s site:
(1) Portamate PM-P254 Variable Speed 3-1/4 HP Router Motor
(1) 1/4’’ Collet
(1) 1/2’’ Collet
(2) Collet Wrenches
Variable Speed Range: 10,000 - 22,000 RPM
Housing Diameter: 4-1/4"
Collets Included: 1/4", 1/2"
Number of Speeds: 5
Manufacturer Part Number: PM-P254
Weight (lbs): 10.2000
If you’re looking for a router motor to keep in a dedicated router table or CNC machine, look no further than the PM-P254. It features a soft-start motor that prevents sudden power surges and is easy on your nerves when you hit the on switch. Five speeds with a variable speed range from 10,000 to 22,000 RPM let you dial in the speed for a large variety of bit sizes, and the motor maintains constant speed under load. The variable speed dial is dust-sealed for reliability and premium NSK shaft bearings ensure maximum lifespan and minimal run out. The 15A motor is sized to fit most 4-1/4’’ router lifts or CNC router mounts, and additional location pins make it compatible with many 3.25 HP router bases.