I recently purchased the modular print bed as it’s nice to switch to glass for TPU and be able to remove the glass for cleaning. The first of my issues was the bed corners that lulzbot recommends to print for the different thickness of the modular bed, they have too much space to where the glass plate doesn’t get clamped down by the fingers well enough to where there’s a gap. So I edited the freecad file and everything worked out.
My only gripe now is the flexing of the aluminium plate, lulzbot purports that the aluminium heat spreader results in more even heating of the print surface. Well with a 1mm gap in the middle there’s no way that this can be true. I’ve found that in order to get good adhesion with ABS I have to increase the bed temperature by 10 degrees higher than I normally used with the original heated bed (especially while printing in the middle of the bed).
Does anyone have a solution to this? I’m having a bit of buyer’s remorse now with all the work I’ve had to put into making this work, I couldn’t find any reviews before I made the purchase and I’m wishing I would have saved my money for a more worthwhile upgrade.