New QHY filter wheels released
http://qhyccd.com/en/left/qhy-colorwheel/qhycfw2/
"QHYCFW2 includes three size: Small, Medium and Large.
QHYCFW2-S: Small size. Support five 36mm umounted filter.Thickness is only 15.5mm. It also support the six 1.25inch unmounted filter with an optional disk(need special order). The weight of QHYCFW2-S is 365g.
QHYCFW2-M: Medium size. Support five standard 2inch filter or five round 50mm unmounted filter.With an optional disk it supports seven 36mm unmounted filter also.
QHYCFW2-M has two models: QHYCFW2-M-UltraSlim and QHYCFW2-M-Standard. The thickness is 17mm for UltraSlim model and 21.5mm for standard model.The weight is 675g for UltraSlim model and 705g for standard model.
QHYCFW2-L: Large size. Support seven unmounted 50*50mm rectangle filter."
OPT has them on sale for US$399 US for the small and US$499 for the medium.
For QHY9 owners I believe you will can only go down to 36mm.
Cheers,
Rusty