Enlarge Ender 3 Pro to a 400mm x 400mm table enlargement

I recently saw a video on Youtube about enlarging the print table on an older Ender 3 Pro. It kinda caught my attention because I am a retired machinist with gobs of fiddle time on my hands. I have progressed in installing a dual Z axis along with a silent 32bit mother board (V4.2.7). And some other ancillary equipment.

I went looking for parts in like a kit at Amazon with no luck. Anyone attempt this kind of upgrade? Are parts available?

Th real sticking point was the larger bed heater. Nothing out there…..

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