Yea, I know...I have had a 53 with both cylinders since 1974... Had another one back two years ago and was tempted to keep the extra cylinder but since it was numbered to the gun I just couldn't do it...so when I sold it I let the extra cylinder go with it...

As to the 17 to .22 Magnum conversion...I already did a 63 with a 651 cylinder and it shoots great... Bore diameter on the 17 is .2225 and the Magnum .224...at the low pressure both are running it should make little to no difference... a few years ago a friend bought a 63 and the cases started splitting as shoot he fired it with Long Rifle ammo...sure enough it had a 651 .22 Magnum cylinder in place... He was able to get a 63 cylinder and now also has a dual caliber gun...

Hammerdown...thanks to a member here I have set of Diamond walnut grips coming for a very reasonable price...they are worn but will look much nicer on the 4" 48 than the Combats do...

Bob