They can be a challenge and often test patience, specially when swaping from PCP to spring or even say a heavy springer to a light one, a tune can transform how it shoots and often be a huge improvement and help as I'm sure your all aware.
but once masterd the enjoyment and satisfaction gained from a perfect shot placement clean kill on vermin, at any range, is in beatable. Ide open her up get give it a once over,get some testing done and take it from there. The .177 will always be snappy even when tuned, just more enjoyable and useable