You did the correct thing.
That said, the
rudder toe-in or toe-out angle will vary boat to boat, and what is correct for one
hull shape won't necessarily be correct for another.
For example, in the twin
engine sterndrive world where the vessel may be running at 30+ knots, the basic setting for twin sterndrives will have the trailing end of the drive perhaps 3/4" closer together than the leading/front end of the drive. This "toe out" varies, mostly with the dead rise angle of the
hull because the
water isn't necessarily flowing straight aft off of the hull surface.
In the twin inboard
engine powerboat world the same thing applies...water flow doesn't necessarily follow the straight fore and aft lines of the hull. It's dependent on dead rise angle, lifting strakes, position of the rudder relative to the propshaft centerline, prop pockets, etc. Running the prototype hull with the tiebar disconnected is more or less standard procedure to find the best rudder position for a particular model, and then that position can be set on the production line for follow on hulls.
So, the remaining question is: What did you find out for your hull? Are the rudders straight fore and aft, or is there some toe-in or toe-out?
DougR