+xA digital gauge means you can more accurately monitor your vacuum level and specifically the leak drop test you can get a better picture of what is going on.
Ultrasonic or electronic leak detectors have mixed reviews. Some swear by them, others find they offer little benefit.
Bagging when inexperienced can seem a bit of an art but with practice and a bit of technique it does tend to come out ok in the end.
Thanks, Warren.
I will look into a leak detector.