For years I used a PC 7539 a powerful, smooth, electronic feedback, 5 speed plunger mounted in a table using a Rousseau plate 'cause I needed the different sized inserts.
The table was homebrew, two layers 3/4" lumber core cab grade ply covered with laminate.
Adjusted the router height using a knob kit that replaced the depth stop on the router. Changing height was two handed job, unlock and turn knob below the table while trying to eyeball above. Changed out bits by lifting out the ~20 lb unit out of the table and plopping it back down.
I have a separate router "station" that is ready when needed, no bench to clear and setup, can also use the router table as additional bench if needed.
If I needed the big plunger for free hand, had to take it out reinstall the depth stop, check for dust in spring tubes and most times dismount the table plate.
First fence (for this table) was a lumber core ply thing with a glued on vac port, clamped to table. Second was Rousseau double face, slot bolted to table. Third fence was Incra Wonder.
Worked with this a long time.
New job called for heavy plunge cuts by hand and big profile edging at the table, ran across package deal for PC 7518 motor with lift, got it. Lift plate was smaller than old plate, needed to fill in table hole and get to work. Soon discovered the benefits of table top height adjustment and bit change.
The ol' table top was getting ragged, the fill in for the lift plate was wearing, the wonder fence was nice but a little disappointing for dust extraction.
Kreg table top and T Square fence was next upgrade. The lift fit perfectly, the fence is guick to setup, the dust port is right behind the bit and I discovered the benefits of a miter/t-track. Added a dust bucket later for the 4" pipe below and 2" pipe at the fence. All is atop of my original homebrew mobile stand.
Current setup is faster all around, fine adjustments are much easier, dust extraction is very good, feather boarding is nicer, coping cuts are safer and more accurate and frankly, it's real nice not having to lift that thing out to swap bits. My big plunger is still ready anytime I need it.