Think you should think long and hard, as you like your Instroke, what would you do to make it better? What would you change to improve it?
If the ANSWER is ZERO, why change? Get another Instroke.
Customer Case makers I would consider are
John Barton, or
Dennis Swift for less than a 2 year delivery, as they both work Out Of The Box, IMHO and will do this like Special configeration, Long Cases, for Long Cues. Deeper, Thinker Wider Pockets, etc.
If you have 2 years PLUS to Wait, talk to Rusty Melton. JMHO
Most of the other are like the guys build Cue Cases are like the Guy who is Customizing a 57 Chevy but your Options are Wheel, Color, Upholstery ONLY, not a TRUE Custom Car Builder like the
GREAT GEORGE BARRIS the King of the Customizers. Again JMHO.