I had wanted a "coffin" style dispense on top but frankly that's too much effort when cooling is considered and I'd rather be brewing beer so I am going to put taps on the collar. Currently I use just a disconnect and tap from The Malt Miller but a year ago I bought this setup for the keezer:

I've read so much into the science of dispensing I'm now so confused. So my questions are:
1) Given the taps are going to be on the collar do I need to reduce to the small beer line and bring it back again?
2) If I do need to reduce what lengths of the small beer line do I need to for a moderately carbonated ale and a very carbonated lager (well that's what I tell my mates, it's ale).
Or should I do something else?
This is my keezer that I'm scared to drill holes in after all the hard work:

And the view from inside:
