Introducing formula to 6 month exl bf baby - have I sold the pass?? Sorry long

[Fingerbobs]

My ds is 6 months old, exclusively b/f. I've started with baby rice which is, hmm, sort of puttering along, although adding anything else to it is a complete no-no at the moment, even the tiniest scent of pear makes his teeny mouth shut like a trap (but that's a weaning thread moan).
Anyway, I've been expressing a bottle for him to have every night so my dp can feed him since he was 6 weeks old. Now he needs so much, and since I'm also trying to express to make the baby rice, it's all getting a bit much and I'd like to replace his ebm bottle with formula. Tried tonight, absolutely no dice whatsoever - even the carrot went down better. Tiny hands clutching bottle, first gulp, horrific screaming. Fed him one boob and tried again, same response.
Am now feeling pretty depressed; has my diligent adherence to 6 month guidelines meant that I'm stuck? Or will he somehow decide he likes the formula after all? Any hints, tips, stories of similar situation with marvellous successful outcome would be very very much appreciated....

how aboiut- carry on expressing for his evening bottle.
and do baby led weaning for his food. that way no baby rice of expressing needed

Would second BLW advice, but if you do want to try formula, perhaps introduce it in a cup, so it's a different sensation to him, as opposed to what he might see as a poor substitute for you? I vaguely tried dd with bottles of EBM, but she wasn't having any of it - I introduced formula in a cup at about 7 months, and she took to it after a while. Discovered she HATED Aptamil, but was quite happy with SMA Gold...

My DD hates bottles with teats but likes the cup/bottle from boots thats a weaning cup, with a soft spout type thingy. trying to get her on to it so i can stop bf when she's 6 mths too, so i'm gonna watch this thread to steal all your ideas .

Thanks for these, particularly the diff types of formula - I guess I hadn't really realised they'd taste different . What sort of cup? A tommy tippee type one or a doidy type one? (just have visions of the 10pm feed taking hours and hours and the bed getting drenched in formula....)

Think formula is not such a nice taste as breast milk (which is very sweet), so prob just your DS telling you what he prefers!
Agree with the others - how about trying to keep expressing for the night feed and doing BLW instead, I think babies often prefer to pick up and play with food rather than having it spooned in.
That way you can avoid all the hassle of trying loads of different bottles/teats/cups/formula etc.
Breast milk every bit as good after 6 months as it is before!

The thing is that he takes a bottle, no problem at all - that's one of the reasons why I persevered with the expressing. It's the formula he doesn't like, perhaps unsurprisingly. I just feel a bit trapped now - I'd been looking forward to the magic 6 month moment when I could replace the expressing with formula. Naive, I guess. Ho hum. Back to the pump for me...

I found both my DSs got much faster at feeding after 6 months, might it be easier for you if you simply feed him most nights rather than express and DP giving him a bottle? Perhaps save the exressing and bottle feed for weekends when you have more time to express and can make the most of the bottle feed to go out?