MikroMir's IRST was a disappointment. It has a clear part and one PE-part, but the body of the IRST is too bulky and lacks panel lines. But I could use it to improve the Hasegawa's IRST.
I had to drill a hole to the nose for Maestro Models' brass pitot tube. The fit is now so good that I could add the pitot tube after painting and everything.