ptulmer hit on what I was goint to say

Tail draggers can benifit from a little toe-out: the main gear wheel point to the outside a very little bit. As a groundloop starts, lets say it begins to turn to the right, the weight is shifting to the left wheel more than the right. If that left wheel was toe-in(pointing to the right some) it would tend to help the plane turn to the right. But with Toe-Out (left wheel poining left some), as weight shifts to the left wheel from a right turn, the left wheel wants to pull the plane to the left more- pulling it out of the right turn.

A wee-tiny bit of toe-out helps, and like everything else, More is not Better- too much makes it squirrelly

oh, just remembered- if you have enough room for rotation, lower the tailwheel to raise the tail a bit. Helps reduce prop induced yaw, but make sure you still have enough clearance to let the tail down some when you rotate to takeoff. Not really needed if you can avoid slamming the throttle and have a nice gradual run-up & TO

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Was just told folks set toe-in standard to taildraggers
This post reflects what was told to me by, Some Old RCguy at a field, and it helped in that particular case. This may not help in all, or your case.
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