Hi Matthew, A "1-armed fork" likes to have the load hugging the arm closely. The 80mm would be out quite far if to the right of the 8-inch SCT. A link says rated for up to 40 lb. I found one picture where the user had two scopes somehow mounted one on the right and the other on the left of the post. That would be ideal. I don't have this mount in-hand so not familiar with what parts allow that. Tom Dey
29-inch Dob in a dome
36-inch upgrade soon
LUNT 80/80 solar scope
FLI 6803 cam
APM 100mm APO Binos
JMI RB-16 Night Vision Binos
Zeiss 20x60 IS binos