Narrowband filter size for hyperstar

[Geordie mc]

Hi. I’ve been waiting 18 months for Baader to supply the 2 inch version of their f2 narrowband filters. They now tell me it will be March next year. With that in mind, does anyone know if I could use 1.25 inch or 31mm filters instead. I’m using an asi1600 mm Pro with Hyperstar on an edge 800 and the Baader filter tray system. I’m worried smaller filters will cause vignetteing but am rather fed up waiting and with Baader’s apparent Indifference. I have been promised various deadlines all of which have come and gone. I’m also looking to get a set of lrgb filters for the same system, so any advice on makes and sizes for that also appreciated.