Scheels Bow Services - should I just opt out for a real bow shop? Kind of feel like I’m getting the wrong info

I bought my first used bow. Went in for new strings. I get a free tune but I can’t even tell if my draw length is correct. It’s a Hoyt Nitrum 30 #2 cam. It was hell trying to find another module to get her lower in draw length. But I have yet to have someone with confidence tell me at Scheels what my actual draw length is. I sort of feel like 26.5 and 27.5 both work for me due to not really knowing where to anchor. I’m ready to opt out of the tune and pay for someone

My question, what can they do at Scheels tune wise now that will save me money with a bow shop? Should I have them dial anything now for free and save the fine tune at the shop? I don’t know much about tuning or have consistent form, so this question may sound stupid to knowledgeable shooters.

***I also so have this weird feeling a real bow shop is going to tell me I’m st 27” and I’m going to have to find another module (3 sets total now) on eBay that is overpriced. Buying an old bow is not worth it unless you know limbs are available and changing draw length does not need extra parts that are not in production!