Do you have an AFSV2 ?
If so and your using a 901 atty I may have a trick / tip when refilling to stop it flooding when refilling , I havent tried it yet but before you take the top off to refill take a the rubber bung out of a mouth bit of a 808 carto and BEFORE you take the whole lid off to refill put it in the 901 atty in the AFSV2 and block the small hole with a bit of blu-tak , then take the lid off to refill then replace lid and once sealed remove the rubber bung .
Now Im hoping that because you equalized the pressure fluid wont flood into the atty when the lid is removed ..
Regards
If so and your using a 901 atty I may have a trick / tip when refilling to stop it flooding when refilling , I havent tried it yet but before you take the top off to refill take a the rubber bung out of a mouth bit of a 808 carto and BEFORE you take the whole lid off to refill put it in the 901 atty in the AFSV2 and block the small hole with a bit of blu-tak , then take the lid off to refill then replace lid and once sealed remove the rubber bung .
Now Im hoping that because you equalized the pressure fluid wont flood into the atty when the lid is removed ..

Regards