Re-bedding a Thru-hull - how big a deal?

[SVRocinante]

Good day all

OK, I'm not trying to be cheap here, but I just got a quote of $400 to re-bed one of my thru-hulls that is leaking (galley sink drain) add to that the bit over $500 to haul, block & launch and we're talking $900+

It's not going to kill me, but also not chump change.

Now, I don't think I can help the $500 part, but $400 seems a bit excessive to take out and re-bed a thru-hull. Is it really a 3hr job?

As best I can tell, I need to unclamp the hose, unscrew the valve, undo the nut, knock out the thru-hull; clean and reverse the process with new bedding compound or butyl tape?

Again, not bitching, just asking from those that have done it themselves in order to make an informed decision to farm it out or go the DIY route.

BTW, assuming I go the DIY route, how do I test to ensure that I did it "correctly"? i.e. I sure as heck don't want to pay an additional $500 bucks to haul the boat out again!

Thanks!