Ultimaker 2 upgrades?

[kallisti5 1]

I've had my Ultimaker 2 going on 6+ years now.  I upgraded to the Olsen block ~5 years ago (long before Ultimaker offered  the + kit).

 

Things have been fine for years, but beginning to get a lot of random issues with stripping filament, abs warping, etc.    Overall things are

working, but larger prints are never successful.

 

Since I need to do an overhaul anyway, I'm thinking of upgrading the stock extruder to an e3d titan.

I'm pretty sure the firmware will need some tweaks with the 3:1 ratio of the Titan?  Already running tinkergnome's firmware, so ok making the modifications myself.

 

Thoughts?   I could also buy the + kit, but would rather spend less on the e3d (and they make good stuff 🙂)