The difference between the grade and gain is nearly all in the head tube length. 180 to 140. The reach is about 9mm longer on the gain, stack is 40mm greater on the grade (as expected). I'm just seeing where the minimum point would be in a safe indoor environment. I'll be putting the grade back to where it was before I started mucking about.
I am on the border between medium and large frames and usually go up in size due to my longer arms. The oddity is there are 2 geometry sheets for the gain bikes. One for the carbon, one for the alloy. The alloy bikes have longer head tubes, reach and stack height are higher as well. I've mailed Orbea for clarification about it.
If I can't get on with this lowered bar position I'll have to rethink the gain purchase
. It already looks like I'd need a different saddle with the lowered position anyway.