I looked, and either the data is not there or I'm not capable of interpreting it. Front derailleur/shifter question:

The spring is too stiff on my Microshift 3X FD (used on a 2X system) for me to upshift with a gripshift. I want to trade more cable pull, for lower force. I've obtained a Shimano FD-5800 105 road FD, it says "11" on the back of it, it is special for Shimano 11 road systems with brifters, as it has a longer shift arm, so longer cable pull than "standard"; What I want to do is use that FD for my 2X system, but using a gripshift (with normal Shimano FD ratios) to shift 1-3 (twice the cable pull) to do it. Are the ratios of that FD and gripshift (again, going 1 to 3) compatible?

I can't yet mount the FD to try it out as it has a larger linkage on the back, so won't fit my FD adapter, where I currently have the Microshift FD. I would need to space it back just a hair to fix that interference.

Thanks in advance.