First, sorry I haven’t around much, had a family emergency requiring me to be out of town for a week. I am just back and catching up on life and destressing. It will take me a while to get back up to speed on things here.
First, a cat needs however much insulin they need. We have seen acros on more than twice what Biscuits gets. People with cats on on higher doses generally use a combination of the L insulins and R. Have you given up on the idea of a switch to Levemir? Back to R, the reason it is good to use in combination with L is that if insulin needs drop, such as tumour pulse or treatment such as cabergoline starts working, you are left with a smaller depot than if the entire dose had been given with just the L insulin,
I agree with Paul that you can experiment with a higher R scale now, provided you can test more. I see multiple R scales on the spreadsheet, but only two with dates above them. which scale are you using now?