I had considered trying to engineer my own SV08 flat bed solution using a $44 350x350x4 mm glass sheet from Amazon that recently became available or the $65 8 mm Funssor graphite bed for the SV08.
I just watched Nadir’s video on the Funssor 8 mm aluminum build plate kit for the SV08.
He is getting slightly more than 0.1 mm of warp across the bed which is way better than the more than 1.1 mm of warping on my stock SV08, although it looks like Nadir’s bed mesh is cheating by only probing the ~240x240 mm center of the bed. I just purchased the $217 Funssor SV08 bed upgrade (including shipping). I’m tired of messing with the warped bed and this looks like a reasonably easy solution. I’ll let you guys know.
After the bed is flat, then I’ll need to address the other SV08 shortcoming, the slow and inaccurate proximity sensor that’s used to make the bed mesh. Sovol has promised to sell us a USB Eddy upgrade for the SV08 soon after the Zero and SV08 Max are shipping, and that sounds like NOW to me. 
I’m looking forward to my SV08 finally living up to its awesome potential.
If Sovol lets me down on their promised Eddy probe upgrade, I might be tempted to swap to Nadir’s V5 tool head and gain LED lighting so I can see the prints, top of extruder filament run out detection so I don’t need to move the run out sensor on top of my custom enclosure and a lightweight extruder with better TPU filament path.
