Stud Hi .5/1: did I go too far here?

[preiserone]

I don't think I would be too worried about seat 1, looks like he has something like a pair and a straight draw and is just going to try and get to the river.
You can be pretty certain, i think, that seat 5 has at least kings or aces and might have hit two pair along the way, his cards are very dead but its hard to put him on anything else.

I think I do play it pretty much the same as you did though, I might put another raise in on 5th and try and knock out seat 1 and punish seat 5 if he's behind in the hand.