Thank you very much for the thoughts on the LED install. I made the attempt last night. It was a little intimidating at the beginning until I finally said "whatever, let's start gutting it".
The online installation guide is for the 250 but there was nothing for the 650. Therefore, I tried to look over the 250 instructions and "make it work" for my system. There are several discrepencies. When I dry fit the two LED rods into the "central hood", I noticed that the heat sink fan casing just (just) barely fit under the metal guide tracks in the frame. In fact, it was a very tight fit for the second one not because it was the second but I think a couple of the casing screw heads stuck out a tad bit and made it a very tight fit. I tensed up, cringed and took a rubber mallet to it and got it in (pics to follow once I hit 5 posts and set up a photobucket account).
Finally got both rods in and knew there was no way I was easily getting either one out. Too late to drill in vent holes above the fan assemblies but there is no way those rods are moving. Hooked up the power and the LEDs came on like a champ. I was feeling good. Then came the dimmer switches. The wiring for the switches are not long enough to do much of anything with them. What I decided to do was drill 1/" hole pairs on either side of the central frame in the plastic end caps where the power cords go through. With the washer/nuts, I was able to secure the dimmer switches facing out from the light system. Awesome!! They are now "easily" accessible. I went to reinstall the central frame into the holding bar for the 650 lighting system and noticed that there was a piece of plastic blocking the dimmer switches from sliding in (both sides are notched for power cables to run through the frame and out the back). I took a hack saw to the plastic and dropped the notches down an inch on both sides. Now, the dimmer switches slide into place, are still accessible and are hidden behind the Red Sea Max caps (again, pictures to follow).
Now is the Typhon controller. Without the controller, I had all LEDs lit up. Then I started using the instructions for the Typhon. When they say it is "very easy and if it takes you longer than a minute then you are doing something wrong" .... well, very misleading. Again, there are no photos for the 650 install. The driver photos for the 250 install are different than the driver set up for the 650. I never saw a "wire bridge" or dip switches on my set up. I saw four driver boards but there were 6 LED "strips". I did my best (and perhaps it still requires a learning curve on the programming of the controller), but I am unable to get all of the LEDs to come on full again.
The controller is a problem I still need to tackle. I was wondering if the Apex controller can do the same increasing/decreasing of LED intensity as the Typhon does via the LED power supply or do I need to patch in to the drivers on the LED rods. If the Apex easily does it, I may just remove the Typhon altogether.
All said and done, Steve's LEDs has a long way to go for the 650 installation guide (i.e. it doesn't exist). Don't take it personal if the instructions say "so easy, you should have it done in less than 30 minutes" and it ends up taking you several hours.