I am afraid at the time of War there was a rather distinct ethnical divide.
For a pure-bred Czech as evidenced by the 100% Slavonic 'Mecislav' and 'Milan' (the latter being a man's name, no matter) and the historical surname ending with a vowel as well (essentially O'Peter), the chances of him flying for Luftwaffe are practically sub zero. As much as running from a firing squad, offender of high treason, would be a strong motivation to get away from the winning parties as far as geographically possible. The escape point then could be anywhere within the Nazi held territory, thus perhaps unknown to his national historians. Good reason for a full 360 smile!. But the predicament makes absolutely no sense, no way at all.
The largest piece of kit the resistance on the Czech side had was quite likely a radio. Most of the activities involved staying in touch and protecting each other, apart from intelligence gathering and informing the exile government in the UK. Training and flying on a Stuka stolen from the Luftwaffe - in Czech lands - is very alternative history. Reality had both Lidice and Lezaky villages wiped out by SS death squad for hiding a radio station used for Silver A para team of the SOE's
Operation Anthropoid (1942).
The Slovak National Uprising had Insurgent Air Force (1944), later supported by returning Czechoslovak RAF Airmen on secondment to the Red Army who flew their Lavochkins across the frontline to inside Slovak territory from the east.
https://en.wikipedia.org/wiki/Slovak...gent_Air_Force. No Stukas there, either.
And definitely not running away from the Red Army but rather depending on their ammo supplies to survive.