Hello sem34090,
I am currently developing a Lever frame loosely based on the 'k' or 'b' type Westinghouse.
This will have a mechanical locking mechanism, I am about 75% through the project for our miniature railway at www.wdsme.co.uk in Dorset.
I have made the levers closer together to get more levers in the smaller space, I will attach a photo.
Nigel