back to op's original question, we have had both side and under. depending on the grade of the launch ramp, I had a HORRID time in wisconsin with the under mount. I blew a tire once and scratched up the rim with the bow hook several times from the under. we had to be careful loading with the under. after that, I vowed to NEVER have an undermount again. it was only an issue on the ramp in wisconsin we used. never an issue in Idaho with same trailer.
if I paid for side, I'd force boatmate/dealer/skiers to fix it if it was me.

nice boat and enjoy...