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Discussion Starter · #1 ·
Whats the difference between the two controllers? The expansion is $50 cheaper in the catalog so I'm sure it has something missing. Why couldn't you just purchase the expansion controller instead?
 

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You need the legacy 990 as the base holds the memory, produces the legacy/TMCC signal for the track plus charges the remote. The 993 base is just for charging the remote. I have both because the 990 charger has been problematic and the 993 doesn’t get as hot plus I like having two remotes
 

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Whats the difference between the two controllers? The expansion is $50 cheaper in the catalog so I'm sure it has something missing. Why couldn't you just purchase the expansion controller instead?
because the expansion controller would have nothing to talk too.
 

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Discussion Starter · #4 ·
Thank you. It wasn't very clear on why you needed to purchase the #990 first.
 
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