[klaucke]

I agree it is much easier to adjust the trailer w/o the weight of the boat on it. Moving the axles is a pretty easy, straight forward job once everything is in position. If you live near some water, I would look into just dropping the boat into the water and leaving it tied up somewhere, if you have access to that sort of thing.

Once you have everything jacked up (either w/ the boat or w/o), you only need to remove the bolts and move them back to the desired mounting holes. Please be very careful that the trailer is properly supported w/ back up in case a jack stand fails, etc. Some blocks of wood or spare tires are cheap insurance!