<font color=blue>I have also violated all of Bird's teachings and have failed to procure a Craftsman air wrench and grinder</font color=blue>
Shame on you Glenn /w3tcompact/icons/frown.gif  I'm quite the opposite I guess.  Being a dyed in the wool, board certified, card carrying, therapy seeking tool junkie I look at any task as an opportunity to add to my tool arsenal.  Just ask my wife, but watch for that eye roll of hers /w3tcompact/icons/eyes.gif
Now if I were in your shoes I'd be looking at a 3/4 drive Ingersol Rand impact wrench for those blade bolts.  That'll be handy to have with the tractor anyway.  I don't have many 3/4 drive sockets so add a set of those.  English and Metric.  Shallow and deep.  A few extensions, a breaker and a ratchet should round out that collection.  Oh yeah, that'll probably need some dedicated storage and my tool chest is full so throw in a larger tool chest.  Hmm, is my air compressor adequate for that wrench.  Probably, but the shear size of that wrench compared to my little 3/8 drive will be an easy sell on the wife for a larger compressor.  Now we're really on a roll.  You mentioned a grinder.  Of course, you'll want a sturdy pedestal grinder and a variety of stones and accessories.  Can't beat a little die grinder for on the tractor touch ups.  I also like a disc grinder when you need a bit more uumph.  Better check storage space again, might be time to upgrade the tool chest again /w3tcompact/icons/smile.gif