TAU 200 sight options

[wcordle]

I have a TAU 200 with the TAU peep sights.

Does anyone know the front sight size? I would like the option of threading in an iris.

Same question for the rear sight. Anyone know the thread size for the rear aperture insert? I was thinking about a rear iris, something along the lines of a Gehmann 510.

Being long-necked I was also looking into riser blocks. Any ideas here would be greatly appreciated.

Thanks
Will