Morning (here) Col
I am not so far from Worthing over here in Kent (minster on sea).
Re cutting with your K40 you should easily be able to cut 3mm acrylic at a speed of 9 or more at 40-50% power.
I also went to a honeycomb bed but found it distorted badly as its small it dint seem to have enough bracing to keep it from twisting and was hellish overpriced.
.In the end I ripped out that awful spring thing and packed up from the base with chipboard and bits of 3mm and 2mm acrylic with a sheet of steel on top and then I used those timber joining things to place the job on (they gave the space for removing air…
I also was able to kind of adjust the bed height by adding or removing the packing.
If I was working with small cutouts then I would turn the spikes so they were down under the area of the part. I learned to do that the hard way as I had one piece drop out crooked, the head then jammed the laser fired constantly in the same place and I had a tiny ‘bonfire’ which spoiled the belt…all good fun!!!
I bought my K40 about 6 years ago…had problems with the controller and power supply early on so went over to an AWC and its still working like a ha’penny watch.
3d printers are cool but oh so slow