A luxury climb - you will like it. I agree with the Old Fart: no need for the gear, unless you're practicing placements. It's super safe with the bolts that are there. Leave your scruples behind about bolted cracks and climb this one - I did, and got the best climb of my day out of it.
For posterity . . .so we all swallow our pride (ethics) sometimes. I guess these days Shelf is the perfect place to do just that. That being said, this climb was fun. The motion was constant and moves pretty consistent. Not sure if there was a single spot of 10b but I'll leave that for you all to decide. Only one pure stemming move with the feet so never really tiring as there was always a good rest at least a move away. A pretty aesthetic route for this section of Shelf Road. That's it.
There is no way you need to place gear between bolts unless you are aiding it! If you get the urge to do so, give the lead to someone else, or lead something easier. This is not run-out by any standards, even Shelf's.