Been my ADV for about 6 months, only done that once then put PTFE under the tank seals. Just removing the very top part of the top-cap to fill makes it impossible to disturb the tank as well.
yeah i can see where you're coming from on the top cap(apologies if i came accross a bit narky),but even with one of the o rings removed its still awkward to pull it off.
Anyhoos,all this talk of o rings has led me to having a bit of a faff about with it and have removed the ring at the very bottom,the one below the tank,and this seems to have sorted it,I think it must have been the extra force needed to push it off this ring that was causing the tank to slide off-bloody simple really
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