I won't judge anyone for trying to save a few quid mate, I have done it myself once with a MAF and I did it more recent with a Hub :( put the hub on thought it was just a dry bearing as it made a noise but had no movement in the wheel so had another bearing fitted was fine for awhile so wasn't until I went to have another one fitted was told the hub was again chewing the bearings up :( anyway less of my problems :) my list is long at this moment in time but hopefully be sorted any day now.