Converting PF30 bottom bracket frame to SRAM GXP cranks

[Foreigner]

Currently running PF30 bottom bracket with matching SRAM Force 22 cranks - 175mm AND 53/39 - and want ot swap for SRAM Force 22 GXP chainset as it is 170mm 50/34. What are the tried conversion kits, would PRAXIS one work OK or are there any other not stupidly expensive solutions out there.

FSA conversion kits are available for MTB/86mm frames, what about for road 68mm shell frame?

 

[krankers]

I had a PF30 bb removed and an FSA alloy converter sleeve fitted by my LBS on a Ridley Helium a few years ago as I wanted to use shimano external bb cups, GXP being a similar system. I had no experience of press fit stuff at the time which is why I had the LBS do the job, but have had since so would have a go myself. It worked flawlessly and gives you the option to use any type of threaded cup. I mention it as I saw a new one for sale on vinted of all places for about £13.50 delivered. I just checked and it's still there.