Meade 8" SCT Hartmann mask

Hartmann focusing mask for Meade 8" SCT telescope
If your printer is not capable of printing > 15cm, just ask for the source files (123d design format)
For connecting the 2 parts, you may use a glue or aceton, or use 2 nuts & bolts M3x12
Shove the mask over the secondary mirror and turn a little. It will be locked.