In a similar situation to you earlier this year, my old concentric was well past it's best, tried various improvements and mods to it, but pilot circuit was main issue, difficult starting and very wet finger through tickling, which could be considered a hazard.
So asked for advice, and several suggestions, but after alot of research choose PWK 30 Flat Slide, after initial setting and some jet changes, this carb is a joy, no tickling, just fuel on, enricher on and she starts first kick, runs great, so very pleased. Jets and spares are readily available, existing cable fits, just some replumbing to fuel lines and addition of fuel filter and air filter.