Ah, the dreaded tip stalling airframe. What the term 'tip stalling' really means is that the ailerons stall the wing tip while there is still enough lift for the airframe to fly.

In other words, tip stalling is a controllability issue you need to practice for by doing slow flight level figure 8's at altitude (3 mistakes high) to learn how to identify its onset and avoid it.

However some tip stalling can be made less of an issue with one or two inch triangle stock at the roots such that the point is on the high side of the wing causing it to stall at the root first and or a little more nose weight. This also effectively raises the approach speed but can be helped by using the rudder to level out the wings on approach instead of ailerons. Part of the problem is the 'down' aileron almost always has lots and lots of drag that you really cannot afford at low speed. In fact if you practice some high altitude slow flight you might notice that when it snaps over in a turn the direction is almost always towards the 'drooped' aileron.

YMMV