shit, theres so much to learn in the pipe.
pump trannys - that means as you go down the wall, you pump while you are in the transition (curved part) of the pipe. if you do it right, you can almost feel yourself boost in acceleration. it takes practice to get. also, keep strong in the legs. i see many people absorb all their speed going up a wall because their legs are acting like suspension on a car.
work on going larger, with more speed, and getting more comfortable with air.
with angles, it depends on so much. the further down the pipe you go, the faster you will be going, but itll sacrafice height (depending on ability) so it depends on what you want. traveling a fair distance down the pipe while still boosting helps ensure speed for hits lower down. once again, it takes time to figure out.
spinning is different for everybody. work on timing the pop. if you land too far in the pipe, ease the amount of pop, and visa versa. however, pop is not always determines where you land on the wall (or deck)
not sure what else