The clips are pretty fiddly. i'd buy an extra 1 or 2 of #11 in case you zing one across the garage or into an abyss somewhere. been there done that.

Since you'll have to gain access i'll recommend you do at least all #10s, #7, and #2s. #12 can really help too but that thing is a huuuge pain to get to on the 6spd.

If you're interested in doing a little better i can wholehearted recommend doing a ssk - even with a lever swap or a full on kit like UUC's. I'm not sure what levers work on the ZHP - i know for my e30 the 1.9L Z3 lever was a popular choice. basically just a $40 SSK. you do have to be careful by extending the length of the arm below the pivot because you'll start getting the selector rod into the guibo. UUC circumvents this by raising the pivot point, but this also has a lot to do with the cost of their system.