I've swapped a (non-XL) 90mm SA for a 120mm SA.

Good spacing from my 72mm. 90mm was just too close.

No doubt I'll sell the 120mm some day when a good 110SSXL comes around, but the 120mm will do for now.

I'll soon be swapping a 150mm for a 180mm. Again, 150mm is too close to the 110/120mm FL.