I *DREADED* nail trims...
I humbly recommend getting those nail-trimming perches... they can eliminate nail-trimming, or at least they have for us...
It was always so stressful for me and the Rb. It took a few years, but I eventually established a pattern/rotation that keeps him trimmed. I haven't had to do his nails in 20-plus years. I keep a dowel as the main "highway" down the middle of the cage, but the special cement/trimmer/textured perches are all over.
A few brands... but there are many: Polly's Sand Walk... Pumice Perch... Trimmer Perch...
Be sure to introduce them gradually: they're abrasive to their tender feet at first.
But I LOVE them!!!!!!!!!!!!!!!!!!!