I did hear the Shimo still need a long break in. In the last week I did break in my 2106 and after about 5 hours oilbath and about 800ml fuel on the track it looks broken in. I will do 2 or 3 tanks carefully next time before going on full race tune. The 5 port R21 also took 5 hours oilbath and about 600ml fuel to be fully broken in.

Side note, I also have an Hasi set in an R2105. That one took more than 6 hours oilbath, has run 2 liters to break in yet and is still not broken in but it is almost there, maybe an half liter more.....

When they all are broken in I will inspect them.