for (int i = 0; i < 6; i++) {
addSlot(fuel = new SlotFuel(bore, i + 1, 62 + i * 18, 36));
}
for (int i = 0; i < 9; i++) {
addSlot(ballast = new SlotBallast(bore, i + 7, 8 + i * 18, 72));
}
for (int i = 0; i < 9; i++) {
addSlot(track = new SlotTrack(bore, i + 16, 8 + i * 18, 108));
}