Mark the positions of the saddle. I use painters tape and cut a sliver of blue to mark the seat post and saddle clamp positions. Also, remember that you are supported by three points when sitting on the bike. Statically, support comes from the sit bones and hands. Dynamically, there is support from the feet. As the spin rate and power increases, cyclist move forward on the saddle and each pedal stroke un-weights the sit bones. The toughest day in the saddle is a long slow ride. When I race saddle comfort is never an issue.
Riding the rollers to increase cadence and improve pedal stroke is excellent. Power at higher cadence takes months and years to develop.
Whatever you can do, or dream you can, begin it. Boldness has genius, power and magic in it. - Johann Wolfgang von Goethe, writer