Question about proper, uh, procedure....

[Laru]

K, I went and test rode a surly cross check at the LBS. LOVED it but had a toe overlap issue. They said that the Long Haul Trucker would probly suit me better since the smaller sized come w/ the 26" wheels and have the longer wheelbase. Plus I need to be able to have a wider tire for riding on dirt and gravel roads and the LHT can do that, too. Soo, they had an LHT there but it wasn't built. The guy at the shop said he would have the LHT put together on Sunday and I could go try it. Well, I am fairly certain it will work for me but of course I can only be completely sure when I actually ride it.

I also know that I want to add on some accessories and switch out a few of the stock components w/ other stuff. Firstly, I will want racks and fenders for sure. Also, I want to go w/ a fairly wide tire. I will need additional brake levers for the top part of the bar (do they call these "interruptor" levers? I dont know - my 80's schwinn had them....) And finally, a Brooks saddle.

So, I guess my question is: If I already know I will want this stuff if I get it at all, should I tell him BEFORE he puts it all together - so he doesn't have to go back and take it apart again. Or should I go try it and then tell him what I want to switch out?
I don't want to waste the guy's time either way. What would you gals do ?