Base size/torpedo marker question

[Chitin]

I've been looking through the forum and haven't been about to find a set of dimensions for fighters, assault boats.  I did see a mention that a fighter should be mounted on a 20mm by 20mm WFB base.

Is this the appropriate size for each class of ordnance?

Whats is the best way to have torpedo markers modeled; as individual markers, each marker grouped together for a single salvo or as a single marker for a single salvo with a set strength?
 
On a related note, whats is your opinion on using the GW downloads for torpedo/fighters/bombers/assault boat markers? 

[horizon]

The markers on the GW website is what came originally with the BFG box. So completely correct and useful.

We still use them.

Check out this for more markers:
http://www.forum.specialist-arms.com/index.php?topic=4033.0

[AndrewChristlieb]

The torpedoes from the box set are all different sizes based off the number of torps in the salvo. With the new FAQ that got nerfed so that all size torps are represented by a three wide marker and a die to show how many are in the salvo.

[fracas]

I use these
http://www.litko.net/products/Gothic-Space-Missiles.html#.UB6Gj2t5mK0

[Chitin]

Thanks for the help and the links!

Has there been any word pre-made/ ordnance markers for the Tyranid fleet?  I ask because that is fleet I am currently playing with.  I assume if they had been made they would of been included in the earlier post I was linked, and would like to know if they may be made at a later date.

[AndrewChristlieb]

Idk about any premade ones but i have seen some cool things made out of toxin? sacks from the 40k minitures. Torpedoes can be made by the bucket full from clay, putty, etc also toothpicks if you just want straight ones but the best nids have little curves to look like worms imo.