No worries! I hated bonding my pair, they were so aggressive to begin with, and it really does look horribly violent to us. But they don't mind in the slightest! If it's just lunging/nipping and Luther doesn't mind, then I would leave be. The first couple of days of our bond were really funny; Ossie would take up in a corner and Monty would keep approaching for a groom only to be nipped at, and every time he crawled up he had this really resigned look of "I suppose I
have to keep trying!" One of the things you'll learn instinctively is when to leave them and when it's going to escalate and you need to step in, so don't worry about how you're doing
It's better to relax and let them work it out, but obviously the main thing is to avoid injury, so erring on the side of caution literally can't hurt. You may also find that it gets easier to control them. I can occasionally (only occasionally, but I like to claim credit!) quell my two just by saying something in my deep, telling-off voice. The other night they were getting too excitable and climbing all over each other and I could see it tipping towards falling out, and a simple "Oi! Yeah, I'm watching you!" from the sofa distracted them enough to calm down. Also don't be worried if it does break out into a fight that they'll then hate each other. Persistent fighting is bad, but we had to stay with ours for the first two days because whenever they were awake there was a constant tension, nipping, chasing, humping. It didn't seem to be a sign of dislike for them, and they (almost) couldn't be better friends now, so they're seeing this completely differently to you. I also expected Ossie to be the more aggressive of the two because she's twice Monty's size, but in fact she just nipped, whereas Monty was usually the aggressive bunny. Being able to look back on it, him humping away at her as violently as he could with her, being huge, running round with him just on her back like a jockey, and one of us chasing round after them trying to break it up was really quite funny :lol: At some point, Luther might become a bit aggressive back, but again, if it's nothing too serious I would leave be and just keep an eye on it.
Good luck with the food! I hope they can share - as I say, there's all sorts of helpful things you can do once they'll eat together
And keep posting and being worried and frustrated; it's all part of the bond, and better to post here than to let them know. I swear they'd play up just to annoy you