DRO for Deckel FP1

I keep pondering adding DRO to my FP1. While I would rather have an FP2 for the long haul, that doesn't seem very probable, and I could always take the DRO off the FP1 if I was to sell it, or sell it separately.

Singer has this kit that is similar priced as the DRO Pros kit:

3 Achsen Digitalanzeige Arbah mit Anbauteile fur Deckel FP1 Frasmaschine | eBay

There is also the Dro Pros:

4 Bad Request

And the Shooting Star: (slightly cheaper)

http://www.star-techno.com/order.htm

Now for the real question. I see some Heidenhain units on ebay, but with no scales or cables. The cables seem to be expensive.

Is it worth trying to find an entire Heidenhain kit that would fit my FP1 ? Seems I might be able to find one for about US $1,000.

I know most people use Heidenhain DROs on their Deckels, since that is what Deckel used, and also they are very good quality from what people say about them. I guess a Newall would be comparable.

Also, is there any advantage to having an LCD rather than LED display ? I realize what the LCD will do, as in ability to draw arcs, circles, and other primitive shapes, but without servos to control the screws, it can't cut them magically...on a manual machine it seems like un-needed expense. Am I missing something in that regard ?

Appreciate any comments.