Hoping crowd wisdom can help me.

I've got an FSA crank that is light and I like. Wanted to put it on my new Argon e119. For reference, the description and dimensions are here: https://mybikeshop.com/...nkset-bb386-evo.html

Since Argon 18 is BB86 press fit, I got these bearings from Wheels Manufacturing: https://wheelsmfg.com/...-bottom-bracket.html

Pressed them in great, got the drive side through and attached my other crank arm but it doesn't have enough room to fully tighten. Taking it apart and measuring it looks like the spindle is at least 2mm too short to attach the non-drive-side crank properly. Not using any spacers other than the dust cover and no obvious fix other than filing down the Argon frame (yes, I know that's not the answer).

So a couple questions:

1. Is there an easy answer here that I'm missing?

2. The FSA bottom bracket looks like it has recessed bearings and might give me the clearance I need: https://shop.fullspeedahead.com/...nk-to-shimano-pfbb86
Any opinion on whether this will work?

3. Any other fix, other than getting a new Shimano crankset and new bottom bracket?



Bonus question:

Do the E119 and the + share the same seat tube? My 119 looks like it could just take the hardware for the tailwind box but one LBS wants to sell a new seat tube as well for >$400. Anybody have any experience putting the tailwind kit on an 119 without changing the seat tube?

Thanks a bunch!

Chris