Spacer and Dust Cover for Energy Rejection FIlter

I had a modified Personal Solar Telescope (PST) using a 100mm F12 scope but wanted to use it on my Williams Optics ED80, this is a spacer so that the original cell holding the energy rejection filter (ERF) can be used with the ED80 telescope, plus a dust cover for the ERF.


I've included the sketch-up file if you wish to modify - it is a really simple design.