songrako,
Here is a response I sent someone reciently concerning the hood. Hope it is helpful. And yes, I did make it myself?
Let's see... I wanted a full fitting hood as I did not want any light spill. The rest was sort of intuitive. since I was copying the ADA stand, with hoses coming out the sides, I need a hood that worked with that. The opening in the side was an obvious choice.
making the hood: let's see, I used 1/4MDF for the whole thing. I started by drawing the end view full size on the end panel material. I made the bottom 1/4 smaller overall that the depth of the tank. I chose an angle that looked pleasing to the eye, maybe something like 4" in over the 6" height. Then I drew parallel lines 1/2" in from that. This told me the interoir shape and also the exact shape of the end panels. The next step, before cutting them out, is to bisect the angle where the top and front/back meet and set my bevel guage to that angle. I have no idea what it was, just take it off your drawing. Use that to set the tablesaw. This method means that you make a perfect angle and all cuts are at the same angle. Now, I cut out the ends close to my line with a bandsaw and used a big horz belt sander to true up to my lines. Your method may differ
You can now layout the opening on one of the ends and band saw that out. Clean up with a handplane or rasp, as necessary.
Now, cut your top panel to the correct width, checking that the inside width is perfect to the top of your ends. Then cut your front and back pieces. The bottom angle on tho front/back pieces is different, I don't know what but it will be intuitive how to find it once you have the parts in hand.
The ends have a 1/4x1/4 rabit in the bottom, inside- this extends past the bottom of the front/back to keep the hood "safe". Give yourself a good 1/8" extra space compared to the tanks length. IE, make the front/back parts 1/8" longer than the biggest length of the top.
To glue up, lay the front, top and back flat with the outside up and the pionts of the miters touching. Stretch packing tape across the joit every 3-4 inches and then run one strip the whole length of the joint. Do this for both joints. Now very carefully flip over, clamping a stick to one end helps this. You can apply an adequate amount of you favorite waterproof glue (I like Gorilla Glue) fold the front/back up and use long strips of packing tape as a clamp. Place your end pieces in each end to make sure you get the angle right during glue up. Tape/clamp as necessary. Finally, glue in the end one the other is dry. I also ran a few fillets up the corners after it was all done to add a bit more strength.
Sand, fill and finsih as desired. A few tips though, seal the bottom edges of everything twice as much as you think necessary, or they will absorbe moisture and bubble the finish. The hood builds up a lot of moisture and condensation on the inside since only one end is open. You may want to add fans or ventillation in the other end or back. Haveing the hood sit up on little 1/4" cabinet door bumps also helped.
Let me know if you want to know more. The only pics I have are in the journal thread.
