I just ordered a used USP 40 V1 and am wanting to convert it to the LEM trigger.  

I'm a long time Glock guy including my duty gun and just have always liked the USP.  My Dad has a USP Compact 40 with the LEM trigger he got when he was a FFDO.  I've shot it quite a bit over the years since he retired and am impressed with the trigger and accuracy.

I'm reading the early (date code KE) USP need a few more parts than just the LEM kit here -

HK Parts LEM Kit

What else am I going to need?

HK Parts state - Please note: That any pre-2005 production USP Variants will also need the new style catch part number 219442.

New Style Catch

It that it?  Am I missing anything?

I can't answer your question about older USP.  I can maybe save you a few dollars. This is where I bought my LEM kit.  Tip: come a point that you put grease on the new parts and freeze then so they stick together during assembly.

http://www.eurooptic.com/hk-lem-kit-for-all-usp-s-hk45-s-mpn-260204.aspx

Thanks !

Also found out that HK Trigger guy Bill Springfield is about an hour away, that's probably the easy solution.

B