ToupTek AFW extender for Baader Filters

I recently purchased a ToupTek AFW 5x2" filter wheel. Annoyingly my expensive Baader filters were too tall to fit into the filter wheel, as there is a little raised board at the bottom of the AFW with two sensors on which the filters were hitting.

I created some washers to raise up this board, so that the filters would fit underneath. I found 1.4mm to be the optimal distance for the sensor board to be raised, so that the filters could fit underneath. I found that raising it 2mm or more caused the sensors to not work.

With this board raised up, the back plate didn't fit as was now hitting the board, therefore I created a collar to raise up the back. Original screws can be used, although a little more care is needed when screwing the back on, as the plate no longer locks into place. I've uploaded two versions of the collar, one with a thickness of 1.5mm taking the total filter wheel depth to 21.5mm (the same as some QHY filter wheels), and 2mm taking the depth to 22mm, so you'll need to account for this difference in your back focus.