In 1985, Australia made a six-match tour of New Zealand under the coaching of Terry Fearnley who prior to the tour had coached NSW to its first ever Origin series win over Qld (the tour actually took place between games 2 and 3 of the Origin series). The Kangaroos won five of those matches, and the Test series 2–1. Australia won the first Test in Brisbane 26–20. On Sunday 30 June 1985, Australia met New Zealand in the second Test at Carlaw Park , Auckland . The Test was a 20,000 sell-out, with all tickets accounted for weeks before the match. The Kiwis dominated long periods of the game but ninety seconds from time the Kiwis lost possession close to half way. John Ribot scored a try and Australia won 10–6. The tour ended in acrimony as tensions between coach Fearley and the Qld players, led by team captain Wally Lewis, reached boiling point with Lewis publicly stating that he had caught Fearnley and team vice-captain Wayne Pearce going over team selections in Fearnley's hotel room, though both Fearnley and Pearce denied the allegations. After the second test win Fearnley made 4 changes to the test team for the third and final test at Carlaw Park with all four players who were omitted being Queenslanders. The changes proved disastrous and NZ ran out easy 18–0 winners.
Two possibilities to mention:
1. If your skin is tender to touch and burning is not affected by body movements and different positions, then it can be shingles (Herpes zoster virus reactivation in one of the spinal nerves). Nausea can be also from shingles. This causes burning pain going like a stripe from the spine to the front. Often (but not always) rash appears after some time. Neurologist would tell you, if there is any available painkiler for your situation.
2. Bulging or herniated disc or some other disorder in your thoracic spine (osteoporosis, arthritis..) could cause pinched spinal nerve. This type of pain would be affected by different body positions and would not be tender to the slight touch. Again, neurologist could say more.
Looking at box stock props, the Trophy is a good but the Pro Max should offer better overall performance and durability. The 8″ jack plate might offer a little better performance when you marry with the right prop. I think the Pro Max, with its tremendous cup wrapped around the blade tips, will give you what you’re looking for with the set back. The Trophy is ″ in diameter. The Pro Max is ″. The props share the same hub size. The Pro Max doesn’t have vent holes nor does it need them. There’s enough exhaust venting over the small hub. The plastic blow out ring fitted over the front of the Trophy would hurt the Pro Max’s planing performance. I think the Pro Max would be a fun prop for your set up.