You can.. and it will stand up to nrmal flight loads with up to a.61 2-stroke or .72 4-stroke. If you use a larger engine, Don't do the all thread without using Chip Hyde's trick of sleeving it with slip-fit CF tube glued FIRMLY to the all thread rod. (he uses that on 30% size models. See the Pattern forum.)

Actually... (this will get some people going...) If there is NO BEND in the rod... 2-56 all-thread will work on the 4*60 for the ailerons... But once it flexes and bends... its over.

Even worse? (maybe...) 2 mm threaded end rods are what Carl Goldberg ships in the box for use on the Tiger 60 ARF for ALL controls. (those are not as resistant to the initial compression induced bend as the 2-56 all-thread... but they handle the loads better after being flexed.) The Tiger 60 is rated for a larger engine than the Sig 4*60....

Amazing what CAN work isn't it?