Hobby or commercial use? How much is your patience worth?
That may sound like "one hand clapping', -- I applaud your using 8020!
Its great - and has multi-re-configure possibilities.
For my System1 and System2, I had some rail-mounts drilled and taped. These match the holes in the THK rail and then to slip the whole piece in the "wells" on the 80/20 for my THK rails sit on top. Worked great and gave me a chance to "square" the setup -- then finish bolting them in place. (Without "resquaring the whole 8020 frames!)
I'm just now completing a Hot Wire foam cutter using 8020 slides - and they seem like a very useful option too. I really would use that approach - on a router mill setup -- if I didn't need/want .001 precision. You can get them pretty tight and seems like no "slop" but you may pay for extra friction and wear on the HDPE bearings. [NOTE THE guys at 8020 SAY IT WEARS LIKE A PIG'S NOSE - is that good?!!!]
I did note in pre-setup on the foam cutter; if you use only the side bearing plates it can be quite "tight" ie no slop - but not as much friction.
I'd say start steppers the move up - sort of bootstrap your way there.
:Welcome aboard - :cheers: Jim
Pics or notes as you go are cool! Or at leat a final summary when done ( I am putting one together on the 8020 foamie - should be soon may show the slide I mentioned)
Experience is the BEST Teacher. Is that why it usually arrives in a shower of sparks, flash of light, loud bang, a cloud of smoke, AND -- a BILL to pay? You usually get it -- just after you need it.