Installed and run a mission from....'over there'

it's a single mission from a campaign a chap is working on, I thought I'd give the map a stress test.
All worked well, as you can see, until my return to base, when on approach to the last waypoint before turning into land at West Malling it began to stutter and then CTD'd, I'm wondering if it's an object overload or some such instance. Still, Canon will figure it out I'm sure.
However, the mission. We were to provide top cover for the poor sods stuck on convoy escort duty down below, climbed up to angels fifteen and sweep along the Kent coast from Dover towards Margate. Jerry showed up shortly after we swung over Deal and laid into the escorts, our leader veered off to port and dived onto some yellow nosed bastards and me and three followed suit. After that, it dissolved into the typical one on one, I covered the skipper for a while and then lost him but found a 109, gave him a seeing too and then found he'd brought a friend who was determined to protect him, I, on the other hand, was not so lucky and had to break away from Jerry, and every time I tried to re-engage one, the other would swing behind me, one of them got a hit on the engine and glycol started spewing all over the shop, tried to continue the dogfight but couldn't aim through the glycol and called it a day. RTB'd and CTD'd.
It can be done!
Red section climbing to altitude
Red leader and Red three swing off to get their bandit
While I find one of my own
Little did I know his friend was nearby...
...as I closed for the kill
No hard feelings, Jerry!