Quoting Philip Morgan I think the shape is good but it could do with more detail. I have just made the Lego Ventor model and it would be good to look at this for inspiration.

Quoting Ryan Scott I think you're off to a good start. I'm not sure if you want to or not, but if you want to fill the gap, here's an easy way: On the base below the gap, put a 1x2 plate that converts to a 1x1 on top. Build a column from that 1x1 and then run a 1x(however long you need) the length of the gap. If you make the column a plate taller than the sides you can put a 2x(however long you need) to cover the gap completely. Just an idea.

Quoting Commander Dynal Yes, in my eyes this needs some improvements. 1. The main body part could use some detail such as turrets, more republic designs. 2. The bridge could by less blocky and have a blue tip instead of a white. 3. There need to be multiple engines and they need blue tips so it has an "energy" feeling. Other then that, I like the overall build and the shadow theme. Thanks for your comment on my venator.

Quoting swash buckler Very nice venator- but as you know yourself little improvements are needed- not big ones- first it needs engines thay are hard without proper parts i cannot give any good advice with that i afraid... it needs bigger tail- bridge is good but too short and "fat" it needs to be taller and not so thick- colors could be better but if you don't have enoughj gray black is ok- it is shadow after all... Also you should fill up the gap in the middle of the hull... but good i give three