My top 3 performers - Mfg Integration, Innovalues and Isoteam. They are still in my core list. Have recently added Best World, its 3Q performance was simply stunning.
I categorise Best World as a growth play. That means we have to tolerate a higher PE ratio. If BW continues to grow strongly on Q-o-Q basis that that will be the investing thesis we can rely on. So watch out on its quarterly performance. As for me I don't look for margin of safety on growth stock, however, I only invest in PLCs with stable/strong balance sheet (key parameter for me). If plans unfold well in China, BW will be an interesting personal healthcare stock to ride on.
As for "margin of safety" selection, look out for GL limited.