Congratulations with success at the first attempt, Amando! You must have a nice dark sky to get that good result with only 7.5 min accumulated exposure. I notice a few red "worms" in the frame that must be due to wandering hot pixels. That could be alleviated by inclusion of dark frames during processing.
For the neck pain look for a DR-3 or DR-4 on ebay, they can be had for as little as $25 shipped with some patience. Actually one of the ones I got was sold by Roberts. 1" fairly thin walled PVC tubing fits right over the polar scope and is a good starting point for an adapter.
I also troubled with finding Andromeda first time I tried - I had forgot how to find it from long time ago and completely missed it. What I do is to follow the right hand part of the W in Cassiopeia down to the first really bright star (Almaak), then go at right angle to the right to the next bright star (Mirach), then at right angle up to the next somewhat bright star and then about the same distance up to Andromeda.
Night to yesterday I had my second chance this year with clear sky and not too much aurora, but -18°C outside. I was sloppy, relied on only having used the tracker for only one night before on the same battery charge - it usually lasts for 3 nights each with a 2-4 hour session. I thought I got in 106 one min exposures, but when I came back last time to check I realized it was no longer pointing at the Pinwheel Galaxy (M101), and had stopped abruptly tracking after only 36 min. Oh well.
After throwing out mis-tracking only 19 frames each remained and is pretty noisy, using 2x drizzle. This is a very heavy crop.
Now these frames could be combined with those from last spring totaling about 2 hours total exposure.
Still more noise than I like and a gradient had to be corrected that was not present in the original stacks. Keep in mind this is in a red zone with respect to light pollution, so relatively more exposure is needed.
