I'm a spoiler factory too. Most drama is just too predictable once the right card are showing. I'd be hunting down a first release next day air or video subscription Vincent.
@RSJB18 , before you tear things down hastily, take a strip of two sided tape and run it on one of the inclined rails. Don't worry, it won't come loose.
Detack it with your fingers, and maybe some layout dust 
. One strip lasts up to a few years. It nearly vanishes once applied because it's nearly transparent. Doesn't come loose, and doesn't noticibly gunk things up. (for a while at least, it picks up dirt off the wheels.)
Even if you want a track change, give this a try for the experience please. It's gonna make you laugh how much better you can climb. I can pull a dozen up a 5%, all on thr grade, with an single boogie drive pulmore. You may be looking for an excuse to change, but breathing some new life into the grade for a bit isn't hard either imo, and I think you've lost out a bit on fun in that respect. Grades let you constantly test locos, but that also means vigilant attention is required, even when not desired. Blocks can make it a no hands affair.
For the decline.. (are you running one dircetion only?) , I use a block set to barely deliver enough voltage to nudge it downhill (cclkw travel; pre-w Z, lower left big dial-C=ground level; big D= uphill; sm. top right dial B= elevated lvl; sm top left A= downhill. B is set higher than C because it needs to finish off some of the grade work.)
A 25w transformer could likely be dedicated to your downhill to minimize that pita. Maybe a 5v acc line lol..
One wire, two slices with the dremel, and an open power tap. Blocks are soooo useful. Once your base layout wires are done, block expansion is zip,zip,1 wire on track center to switch, 1wire from sw. to power, 2 blocks all done.
E.g. 4 blocks, A 4PDT (2 pos, 4 circuit) and you can be back to manual(1 main throttle) or (2 block) semi-auto downhill (or climb) or "full" auto-pilot (X?-blocks) with a click or two and one wire per block.
I use the skinny 1/2" Frost King tape for winter window shrink-plastic. It is rubbery, maybe vinyl, peels off in one piece pretty well, and is exacty the right size for tube track. Use a rubbery tape vs some plasticy Scotch types that might break on removal...pita (? Scotch might be rubbery too?). I would avoid or at least detack both sides of a plasticy tape 
