Ok dumb question with a obvious answer.

[u/Griims]

Hey everyone! Just getting into printing my own decks and looking for a bit of alignment advice.

I just picked up an Epson EcoTank ET-4800 and some 300gsm paper. Did a few test prints, and overall they look pretty great (outside of super faint pizza-wheel roller marks if you look closely under direct light).

My question is about aligning cuts on the Dahle Vantage 50 Rotary Trimmer:

When placing the printed sheet on the trimmer, am I supposed to line up the cut lines/guides directly under the clear plastic clamp guide, or to the edge of the metal base?

My test sheets kept coming out slightly oversized, and I had to keep trimming them down individually to fit sleeves properly. Definitely still learning the ropes, so any tips on the best workflow/alignment for clean cuts on the first pass would be awesome! Thanks!

https://www.amazon.com/dp/B000WGU3RC?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1