[Feature Request] Enchance pdf generation quality, reduce size

[slyromania]

Is your feature request related to a problem? If so, please describe it.
The problem is that the low resolution pdf is really low quality and still creates a really big file. The high quality pdf is huge and the quality is still not perfect.

Describe the solution you'd like
The solution should be something that Custom Brick Generator page is using for the pdf creation: https://custombrickmosaic.github.io/
The same 96*48 resolution pdf is 3.4 mb with crystal clear numbers, text and pictures. When done in your page, the pdf is 23.4 mb for the low res, 93.4 mb for high res, which is 30 times bigger and yet not on the same level of resolution and detail. I was using the same browser in both cases.
The numbers are not centered on the pieces on your page and the design on the other page is more close to the real LEGO instruction, which is minimalist and better. Please consider changing that, as the outcome is the most important for the users using your page. Apart from the pdf problems, you have created a very good and resourceful page, congrats, I really like it.

Describe alternatives you've considered
Any kind of improvement on the resolution/filesize could be great, the above page is just a very good example of a working solution.

Additional context
Add any other context or screenshots about the feature request here.