got the marker from some one oh here was told had a leak on bolt but come with the seals to sort done that no leak but will only spit a ball out of the end once and thats it soliniod sounds like it clicking ok and it airs up and bolt goes back but thats it its clean now and no leaks . has a proto melenium board in it and as far as i can tell the settings are right dwell 18 trigger 5 . any ideas before i give up and send it to a tech to fix to sort