She must really be short if she thinks the tour pack might be back to far?? I've never heard that complaint before, that's a first.
As far as her hips locking up and/or aching.....that's not all that uncommon of a complaint. And the vibration in the left floorboard......have you checked the mounts to be sure they're tight? If they are, then it may be a pinched nerve in her him that she's translating into the floorboard.
First I'd suggest the Kuryakn Adjustable Passenger foot pegs......they mount in addition to the floor boards, so she'll have several different options for foot location and they change the angle of the hips at the same time. $161 at Dennis Kirk..... http://www.denniskirk.com/jsp/product_catalog/Product.jsp?skuId=494787&utm_source=google&utm_medium=cse My wife swore by them back when she was riding BSR.
Secondly, while she may have settled for the seat on the Ultra Limited.....we all know that those that think any HD seat is comfortable just haven't experienced enough seats out there to really know the difference. There are two or three that lead the market in comfort and Corbin does it for us and has for several years, on several different bikes each, now.
I wouldn't call her really short, she's like 5'4". She's having a hard time describing the problem, but she said it puts her at a bad angle. I think maybe the foot position is/was the root of the problem. I may move the tour pack back to the rear position and raise the floorboards a little more. I noticed her thighs weren't level last time she sat on it. She did say leaning forward relieved it a little.
The floorboard vibration has me worried. Not that something is wrong with the motor, but that I won't be able to get rid of it. I can always use the Road KIng as our 2-up bike, but I'd rather use the Ultra. Besides, it cost almost $20,000 more, so it should be comfortable for both of us.
The seat on the 2010 Limited was pretty comfortable. I routinely put in 10-12 hour days riding, about 30,000 miles a year, so I'm kind of familiar with buttalytics (yes, I made that up
). After about 30K miles I switched to the HD Hammock seat and man, I could ride forever on that thing. I don't mind changing seats, and I'm not an HD bigot, I have had Mustang seats in the past, but they are expensive experiments. I wish they had a ride and try or satisfaction guarantee, or something like that.
The Viberider may be fun once I get these other issues worked out.