I had modified the stock seat myself. It's really not that hard to do, and the result was muuuuuuch better than stock. I put about 20,000 miles on it, some 500+ mile days and many 1000+ mile trips. A couple years later I found a used top sellerie seat for sale on here and bought it. It is also a huge improvement over the stock seat, but I have yet to put as many miles on it as my custom seat. I anticipate being able to put in full days on the TS without any problems.