Trying to taper down from Tramadol

I am addicted to Tramadol. I am trying to taper down. I am down to 300 mgs a day. I used to be doing 800 mgs a day which is twice the recommended daily max and well into the seizure risk zone so I dodged a bullet in never having a bad effect over the last 5 years that I was taking them I guess. I was always taking the instant release IR 50s. I am trying to taper down by 5% a week. I know this is slow but seriously any faster than this and I really feel messed up. Last week I couldn’t get the 50 ir capsules and I picked up some 100 mg extended release tablets instead. This is the first time I ever tried. The ers are supposed to last for 24 hours and the irs are only about 6 hours or so. The experience was quite different. The irs definitely give a better buzz and warm happy feeling but the ers give me a much more stable, generally feeling OK feeling all the time (but I am always sort of waiting for that feeling of them kicking in…and it never really comes). I was thinking that I might be better off tapering off the more stable ers rather than the more up and down irs? Does this make sense? Also because the ers don’t give me a buzz and I guess this is something I need to learn to live without if I am going to be able to live without tramadol at all at some point. But I am having trouble finding out if you can cut an er table in half without then dumping all the drug into your system at once (once you have ruined the exterior coating). Can you recommend a way to taper using the ers?