I bought these a year ago to improve a homebuilt achromat, but the project didn't work out, and now I guess it never will. Selling the below as new. Prefer to sell at least the extender-q and adapter-q as a set.
-Takahashi extender-Q, caps, box, instructions. Adapter-q to use extender-Q with a 2" diagonal, original cardboard box. $245 shipped in CONUS.
-Takahashi adapter to use extender-Q in 1.25" drawtube (i.e. use it in a non-Takahashi telescope). Ridiculously priced new at $68, yours for $35 shipped in CONUS. This adapter already SOLD, thanks Dave.
USPS money order or personal check (must wait for clearance) only, please.