Honest Boss, it was straight when I bolted it to the gate!! The trouble with sliding gates is that they have to run parallel and true. I think that this drive rack was installed for an electric sliding gate to operate in the Welsh Valleys.
If you want a “proper” electric sliding gate, check out newgate’s web site on http://www.newgate.uk.com/. They also do swing gates but not to operate around corners or up hill!