Test ring for testing retraction settings to mitigate stinging

https://www.facebook.com/groups/FLSUN3DP/permalink/572152146483876/?comment_id=572236133142144&reply_comment_id=572244786474612¬if_id=1518548763556919¬if_t=group_comment&ref=notif

set retraction to 1mm ... print.... increase until stringing is acceptable or gone

urse retraction at your own risk. no guarantees.