Upgrades are good!
I'll be doing a H3 upgrade to my 318. I just need to buy some fittings, and the 3 spool valve. I didn't notice it until I dismantled my 317 (for parts), that there was a 3rd hole in the block for mounting the levers. I got a lever for it, and now just need 1) to get my 3 spool valve, 2) fittings, 3) finish my loader project on the 400.
Isn't it great having extra parts!