Harness question

Ok my fellow car seat obsessed friends & esperts, I'm having a harness problem & need help.

My DDs ride in Crapnera's, uh I mean, Sceneras. They're great & fab & all but I'm running into the problem that I cannot do the harness on DD2's seat. It's not a seat problem (well a tiny is as most know the Sceneras harnesses are a tad hard to tighten & loosen), I'm the problem. I no longer have enough strength in my left arm/hand to pull out/loosen it to get her out. She tries her best to help me (which used to work great) but she's not strong enough to pull it out on her own & I'm obviously not assisting her enough. I can't leave it tight because then she's struggling to get her arms in & out & screams, so it's obviously uncomfortable for her to squeeze in that way.

My basic question here is what seats do you feel offer a nice smooth harness?

I think for now I'm going to have to take my FPSVD back from my mom & use it for DD2 & just switch the GN to my moms car anytime we let her take DS, but that will offer a very temporary fix as it's a low RF weight & we know how we all feel about that. LOL...

This sucks because I cannot afford a new seat. I don't think I'd qualify for help from KDMF because technically my girls have perfectly fine seats that will harness to 40lbs.

Any suggestions will be gladly considered. TIA.

The MR has a smooth harness like the GN. They've been on sale a lot lately. My Target has them for $130.

Could you just switch the Scenera with your mother and use the FPSVD until you reach the weight limit? Then save up your money until then to get you child something with a higher weight limit.

Would the knob adjuster on the Triumph be easier for you?