Wanhao D9 bed spacer

thingiverse

The cap screws that hold the rollers under the bed were rubbing on the frame behind the main box and the deck was rubbing on the rear stop switch. I also noted that the screws holding the rollers under the bed were cantered when properly tensioned. The flanged end of the spacers give a little more support under the bed which has solved the issue of the wheels being cantered. The spacers are 2mm taller so you need to ditch the spring washers to keep the screw length, it was a must in my case as like I mentioned the head of the screw was rubbing on the frame. Ditching the spring washer gave it clearance and the extra bed height stopped it hitting the rear switch