Please be aware that boars always have to start back straight in square one when you separate. Once you have committed to an intro, you need to see it through! A series of short meetings is rather frustrating and counterproductive for them as it prevents them from working through the whole bonding manual past page 1.
Best of luck! Things should be a bit easier now as they are both past the worst of the hormones. The most critical phase in bonding adult boars is usually when they wake up from their first nap together and realise that another boar is with them.
It is not easy to commit to a bonding when you don't have much experience and are very worried about aggression, but the less you interfere (except for when things are blowing up, of course), the better.
You will hopefully find our guides on bonding and behaviour helpful in judging what is going on.
