I have a Ender 3 Pro already thats maybe 1 year old and love it. I expanded it to 300 X 300. Im still useing the original heater. Which now takes longer due to 300 X 300 aluminum build plate. Id like to get a 300 X 300 heater BUT none at that size with correct hole locations. Hence Im looking onto replacing Carriage with CR10 carriage. If my 300 x 300 supplied aluminum build plate, supplied with hole for Ender 3 235 x235, I can redrill that plate to install on CR10 carriage. THEN I can get the 120v 300 x300 keenovo 750w heater. THATS THE GAME PLAN