Mix mounted and unmounted filters in FW?

[Icesheet]

Wasn’t sure where to put this but I’m wondering if anyone knows if it’s possible to mix unmounted and mounted filters in the ZWO filter wheels which accept both? 
 

I have a full set of 31mm unmounted filters which you have to secure with some screws and washers but then it looks like it would not be possible to thread a mounted 1.25” filter due to overlap of the washer and screw. Wondering if anyone knows if this is possible or if there is a solution to it if it isn’t? Picture below that might help If I’m not being clear. 
 

Edited February 9, 2021 by Icesheet
Added picture

[Icesheet]

In case anyone else has this question Zwo support replied to me. 
 

Hello Chris
Recommend to use the same specification（all mounted or all unmounted ）

 

 

 

[wimvb]

I’ve tried this and it doesn’t work. Screws are in the way so the mounted filters won’t fit and vice versa.

[Icesheet]

Thanks for clarification Wim, I suspected so. I was looking at buying an Astrodon filter on here. Looks like I’ll need to look out for an unmounted one.