Good choice of electronics. I just retro-ed a table with a plazpak and the same K2 6" slide, works great. I ran out of money before I was able to get a new Hypertherm 85 and the new Hyt rs485 stuff from CandCnc. I did get the digital current probe and the remote pendant. Both are handy if you can get em. Hopefully a 85 in the near future!
The pics you posted show the linear rail facing up, if you can get them turned and below the slats it would be better for you. Less stuff to damage those nice ($$) rails.