Found 'enigma signal meter - krkadoni edition' very useful - runs on pc with xp.
You need to be able to see your stb on the network to use it.
Also need to have setup a bouquet to select a channel from, not the raw channels/satellites as they don't show on list.
13,19 and 28E are powerful enough sats - never had much trouble getting them.
What you could do is try and get 28e by putting an lnb at the centre and lining up the T90 pointing in the same direction as your *** dish.
You know you stb is configured and working on 28e, so all you have to worry about is moving your T90.
Make sure you use the dishpointer website and put in your location to get a good starting point to setup your dish, especially elevation.
When you get that you have a reference point to start from. If you are putting 13e as centre, then when standing in front of the dish, 13e will to the right and lower - you have to move the dish to the right and lower it at the back.
In between 28e and 13e you should be able to get 19e.
A 28-19-13-0.8 setup with 13 as centre will look from the front as 13 centre, 19 to the left and higher, 28 further to the left (further than you might think) and higher again. 0.8 should be to the right and slightly lower than 13e.
If you search the web, you will find that someone has an updated list of the strongest transponders/channels on each sat - use these channels when initially trying to find sat.
One very important lesson I learned was to have your stb connected to the lnb directly and not through the disecq switch when trying to find the sats.
Last point I would make is that anyone who has ever ventured with a multi-sat setup (T90 or otherwise) will have got great Fun/Frustration from doing it.
I used the t90 calculator at satlex.de to get the lnb positions depending on your location and your centre point, but it looks like that site is gone....
WW