Quote Originally Posted by wilfy View Post
from a neutral point of view with no experience just thinking about it logically.
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i'm not saying it wouldn't work.. and i have no doubt that yours works flawlessly jonathan, but my mind tells me to simplify to reduce the chance of error
That's the point though - by agreeing with that you're agreeing that your logical thinking earlier in the post is based on a false premise, therefore you may not be arriving at the correct conclusion even if the points you are valid. In other words, if my system did have a 'little interference' which caused one stepper to slightly loose position we wouldn't describe it as working flawlessly.

Either way, if you buy the right electrical parts either system can work flawlessly, so in the end it's just a case of working out which is the most economical.