:wave: Hi,
If you can get someone used to bonding to do it for you that would be best (it can be nerve-wracking for those of us not experienced and if 2 large buns fight I imagine it's not easy to separate :shock
. I've never bonded although I've observed at the start and had newly bonded buns who fought, and it can be hair-raising. You need to know when to intervene yet try to be hands off as much as possible. Knowing a fair bit about rabbit body language and keeping a cool head is really useful. Your local rescue (for a small donation) or someone on here might be able to assist / do it for you.
From listening to others on here, some of the 'rules' I can think of are:
Neutral territory means somewhere neither has been.
You will need to set aside a few days to do it and be prepared to have them inside with you at night so you can split if anything kicks off.
Keep them in a small, constant space (like a bathroom) you can get to quickly and avoid giving them anything they can become territorial over (litter trays, food bowls, etc). Just scatter the food about.
Some people recommend starting with a car ride (place buns in a carrier) as they may be nervous and this encourages them to seek comfort in the other (if you have a carrier big enough for conti's, plus 2 people- 1 to drive, 1 to watch buns).
Humping, fur pulling and chasing is all normal, sorting out hierarchy. Do not intervene in this as it will prolong matters.
Full on fighting not good, intervene immediately. Keep a broom handy at all times in case you need to separate so you don't get bitten.
Ignoring each other in the early period is a good sign. Grooming and snuggling each other is very promising indeed.
Others on here will think of plenty more...anyone?
Good luck!!