I was planning to use a 2-pole centre-off switch with a supply of suitable voltage, once I have got the motor in and tested to see what it needs. to them continues to do so and the isolation continues to avoid shorts during rotation. All you need to be aware of is outlet polarity on the reversed polarity outlets and getting that correct with respect to layout polarity.

I used to produce this 'adaptor', initially as a 'service' to model railwayers, but have found it financially unviable. effectively make a reversing loop, is a short caused or is the loop isolated by the different positions of the rotating rail as it goes from one turnout to the other?[/i]"If you do not put the Water Crane in position, there is nothing to stop the Square Hole pinion being used with an electic motor drive... connection has the polarity reversed (my reference was to a reversing loop situation in my original post), then there is still an isolation issue. But a simple gapping still has the problem of a loco shorting over it as it passes surely?

You will need to feed the rotating bridge motor from the dc supply using the old dc controller. So locate the two wires that run to the motor and remove them form any Ignore the DCC Decoder connections to the hut for the R410 TT, this drawing is for a motorised bridge R070 TT and not the manually rotated R410 version. I am thinking of putting a building over the motor housing....possibly a 'sand house' with a chimney for ventilation...or a Water Tower with vents?The next potential problem for DCC is that half the outlet positions are at reversed polarity to the inlet. This is due to the way the connections are made to the bridge under the turntable and you can look up Brian Lambert for an explanation Kerry, you've now used up your two posts until this time tomorrow. If only you had answered ALL my questions like Q1 & Q4 in the absence of full answers. I shall now have to make some assumptions to fill in the gaps. I, too, have just bought and installed a Hornby Turntable. I think you have made two conflicting statements in your post...