The problem with morning star is not the strength of the wind, but rather the effect the obstructions such as the trees and hangars have on the wind. I have taken off in fairly strong SE at MS and been moered by the bumps, only to go to Altona, (which is at right angles to MS runways and almost always 90deg crosswind) and because there is no rotors circuits there are easy, even in heavy winds.
We flew the competition from Wintervogel last year and the wind conditions varied from mild to very strong and there were no incidences and all the guys landed easily.
It's what you are comfortable in. The only wind I don't really like is the easterly as you have mentioned because you get lots of turbulance and standing waves that are not fun
However I am a 3-axis pilot. My mates like CLU-less and Gert will fly their trikes in most wind, and will land in any conditions (sometimes you go for a flight and when you return the conditions have changed drastically

) Our chairman last year was debating not replacing the windsock at MS when it wore out. He said if we put up a new windsock, no-one will fly
Once you are up in the air the wind strength is not really an issue except of course when you want to cross the mountains, then wind is critical. Also if you are not moving forward, then perhaps you should land. I saw Gert takeoff at Saldanha on the way to Lamberts Bay and literally hover above the runway. The wind was pumping 35mph NW that day. Gr8-dad and I flew down to Saldanha from Nooitgedagcht in his Challenger on that day and it was a breeze (forgive the pun). Going back, into the wind was a different story, 30minutes for 10 miles

. We turned back and landed without an issue at Saldanha and fethced the plane the next day.
My pet hate is turbulance. I still don't like being bounced around, although it is a lot easier to handle in a Bush Baby than a Challenger.