I get it if you don’t want to buy the Affinity for your laptop. The iPad version is $10 one time cost. I have been able to use Vectornator to make suitable files for Spencer. As far as a free solution for the computer I don’t know where to go from thereI tried to send my first file to Spencer the other day, he recommended using at least affinity designer. Honestly, I need to make sure I’m determined enough before I spend money on it. I’m using my laptop for designing and don’t have a tablet. Although I thought it was a one time purchase for laptops…
Anyways, when you used Spencer’s templates did they load into vectornator at 1:1 scale. I loaded the 125b svg template and it’s 2-3 times larger than a 125b. I had this issue in Inkscape as well.
Also I didn’t use his templates I did what BigMonk said and did it from scratch. There is a link that I found one of @dmnCrawler threads about Pedal Decals. His site has some great templates and icons in SVG and pdf format. Search Decals or search his name and it should come up