One monoblock process I explored was to thread the monoblock and barrels together. This is definitely a machinists thought process (that's me). No heat, no distortion, no solder line, rifle like proven construction. This would allow the monoblock and the barrel tubes to be mated here in the states (maybe by Steve). So, you'd have a all machined barreled action assembly less the barrel spacers and ribs. A neat concept from a machinist's perspective.