Well crap, I just signed up for this to be my first challenge. In fact, this is my first ever post.
I didn't look at other designs here, so sorry if this is copied. It made several attempts and most were stricken with coming in too hot while under parachute. I finally decided to try to have an asymmetrical design with parachutes on one side and modular girder segment on other to take the landing (allows 80m/s!). In previous attempts, I added a drogue chute to stabilize decent under parachute. In my successful attempt, I tried without drogue to get launch under 5,000. It was very perilous without because it teetered violently under main chute. I had also lost all electric charge so maybe it would have been easier had I saved some juice for SAS right at touchdown.
I think I either just made 1st class, or slightly missed it with KSC biome, which I guess I could reattempt.
Launch cost: 4,918
Recovered: 4,096
Mission cost: 822
Distance from KSC: 1.8km (97.9%) - Does this count as KSC biome?
Parts: 9
Science: Thermometer
Highest tech: I don't know how to tell this, but I think highest tech part is small nose cone and FL-T800?