I know what you mean. If it goes pear shaped again in a big way and I'm as far away as say Malaysia, I'm going to send it back home and buy another one from a builder or manufacturer who can offer me real support, and it will be derailleur based too, and half the price.
Through most of your RWT route; getting standard bike parts, other than items like your Hub and drive belt, should not be a problem you might have to buy cheaper parts but that keeps you on the move. Even if the frame break you should be able in the main cities or Towns to find someone who can weld the frame, anyway flying spares to you via DHL, Fedex, UPS is easy enough, just a tad expensive, once you have done your courses you will have not problems fixing things. thats the advantage of a bike, its made of readily available standard parts in most cases. And will save you the effort of arranging shipping the damage bike home.
One bit of advice i give peeps, preventive maintenance is the answer to avoid many parts failure, at the end of the days riding, always take time to check the bike over, check the tightness of all your fastenings, and spokes clean your chain, and then lube it, check all your cables and brake hoses look for cracks around the spoke holes on your wheel rims and cone adjustment. If done in the evening it allows the fresh oil on the chain to soak into the rollers, then in the morning just wipe a rag over the outside to remove any surplus oil.
I noticed in one of your posts that you thought not many people did RTW tours, once you are out of Europe you will be surprised the amount of cyclist doing Long haul tours, indeed some routes feel like the M25 at times, and you can struggle to fine somewhere to stay.
