I use my 45mm olfa and gingher with no problems, you should be able to use yours, you do have to start in the wider slot opening at the bottom of each line

I use a 60mm Olfa rotary cutter. It is at the right angle to put the maximum amount of blade thru the slots. It gives me the best results

I use Fiskars and Olfa and don't have problems cutting with them with my June Tailors...

I always use my 45 rotary cutter and have not had a problem. The issue is to make sure that your blade is inserted in the beginning slot and then follow the slit closely. Go slowly until you get used to it. One important thing is not to cut while sitting down.

I use my Olfa 45 but it took a bit of doing to get it to work. you have to be vary careful to hold the cutter straight. I learned that I could NOT use my either-hand Fiskars 45 rotary cutter because it bumped into the slot, which caused some ugly cuts in the teardrop part of one of the slots.
I love my shape-cut - I have the big one which will do 24" long pieces. Love it!

Same with me, but please be careful. I was cutting strips for a quilt and cut almost all the way through my finger, (new blade). I wasn't paying attention to where my finger was when I was zipping through all that cutting. But I still love my June Taylor, just a whole lot more careful.

I'm also a Fiskars girl and use my 45mm all the time. And, yes I've knicked also, but go slowly and you will appreciate the efficiency of the Shape Cut. (I've also used an Olfa cutter, but I'm so used to my very old Fiskars!) What does "Lang may yer lum reek." mean? I'd love to visit Scotland one day.

I have a 19mm rotary cutter, works great on templates like that.

If you will notice, most rotary cutters have a ribbed area above the blade. Put your index finger there and you will find you have more control over the cutter--and of course, always start in the slot.