edit: please ignore, I realized that the flight model at this time was actually like a Delta-glider
I found a method of re-entering my vehicle;
it is by no means realistic, but it is relatively easy to accomplish. This method is inspired by blixel's (David Courtney)
method of landing the default Delta-glider, but is not quite the same. It also doesn't waste RCS fuel, and you do not have to wrestle with the controls.
1. Use
BaseSyncMFD to determine when your orbit's path will pass closest to the target base.
2. On that orbit, perform a de-orbit burn half-an-orbit away from the target until your periapsis is 0 km.
3. As you're nearing 120 km altitude (where the simulated atmosphere starts to act on your craft), turn prograde and level horizon (yaw to point yourself near the prograde vector).
4. Somewhere below the Karman line (<100 km) in which the atmosphere becomes slightly more dense, use the roll (numpad 4 and 6) as well as trim (insert and delete keys) to make it so that the projected flightpath in
AerobrakeMFD reaches the base.
It is important that you use x0.1 (10 times slower) time acceleration and quickly tap (not hold) the insert or delete keys in order to have more precise control over trim and the projected landing distance from the base (which is actually very stable and does not jitter around if you leave it alone).
As you can see it is pointed close to the prograde vector. The "animation trick" will make the craft look like it is pointed 40 degrees upward when viewed from the outside.
5. Don't aim directly at the base, aim for a spot a few dozen kilometers out so you can prepare your runway approach better. (Also you can bleed off more speed by banking and turning)
6. Line up with the runway and land.