| Projector 1 | Projector 2 |
| 400W MH lamp, large socket, 35.000 lumen | 250W MH lamp, double ended, about 22.000 lumen |
| LCD projection panel 640*480 €50 | Lilliput 7" LCD 800*480 €200 |
| 4/3 | 16/9 more light loss, optimal would be square or even round LCD |
| 1 VGA-in, connection of VCR via TV-tuner-card | 1 VGA-in and 2 Video-in |
| first singlet lens, now triplet | triplet lens from start |
| 12V(PSU) for integrated PC,LCD and fans | independent 12V for LCD/fans |
| 1x12cm + 3x4cm fans | 2x80/92mm fans |
| cheap OHP optics | better fressnel+triplet+condenser |
| integrated PC | maybe... |