PIG headliner show length?

We saw PIG last night opening for Nitzer Ebb. Unfortunately he had to play an abbreviated show - only about a half hour. My main interest was seeing PIG, and my husband said afterward that PIG was much more interesting and he should have been the headliner (he's seen Nitzer Ebb before, had only heard PIG in passing).

We were thinking about zipping out to one of the towns where he's headlining to catch a show, I'd like to get an idea of how long the show will be to decide whether we should just wait until he comes back to town.