I have an X5S (330*330*400) and have just ordered the X5S-500 (500*500*600). As other have said they are a good starting point if you don't mind tinkering. The belts on my X5S were aligned correctly when I received it and I agree with reinforcing the frame. I have replaced or added the following on my X5S: 6mm steel core belt to 6mm fiberglass core belt for improved flexibility All pullies haveby tletourneau - CoreXY Machines
I'm really interested in trying this but I need to figure out how to get it to work with the Petsfang cooler (https://www.thingiverse.com/thing:2984806). I have a TronXY X5S with an E3D-V6 and the linked Petsfang cooler. I have a BLTouch Smart now but I really like the idea of the hot end being the probe, no X or Y offset and little to no Z offset. I've looked around on Thingiverse but haven'e fby tletourneau - General
Sorry to necro-post but I was looking for an answer to this for some time before I found one so I thought I'd share. These worked well for me:by tletourneau - CoreXY Machines