Hi Sam,
Sorry I couldn't get back to you sooner. Lifes very hectic at the moment and haven't had time to get back to mine yet
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In your circumstances I would just concentrate on getting the bike started after the rebuild of carbs on something like 1 1/4 turns on all carbs. Warm up the engine and set the throttle so it will idle near the normal idle speed.
At this point turn each mixture screw 1/4 turn out and see if the engine slows down or speeds up. If it speeds up, (leaning the mixture) then reset the idle speed and do the same again, repeat the process until the idling becomes less even and slower (now too weak). Now go back to the sweet spot in between where it is the most efficient idle mixture setting for idle speed.
Test throttle response for good pick up and give it a road test.
Let us know how you get on.
Hope this helps
Dennis