- I don't like the fact that rocking W-irons require the springs at one end of the wagon to be seperate from the solebar - a minor detail maybe, but enough to be noticeable.
- For open wagons (without loads) I like to fill the whole underside of the wagon with liquid lead for additional weight (particularly important with plastic wagon kits). Fitting a rocking W-iron would mean less space for this.
- According to several members of the P4_talk discussion group, rocking W-irons tend not to perform as well as sprung, or even rigid wheelbase wagons. Of course, how 'scientific' the tests that back up this statement have been I don't know!
So I'm going to get hold of some Bill Bedford etched sprung W-irons and see how I get on with these.