HP-25E GPS ACT Version

[smp]

Hello all,

I am considering purchasing an HP-25E GPS ACT Version kit from Panamatik.

I do not currently have my own HP-25, but I found this one on TAS:

http://www.ebay.com/itm/HP-25-ULTRA-RARE...SwCkZZSgMx

Can anyone offer me some advice on whether or not this particular HP-25 might be a good candidate for performing this upgrade? No strings attached. I am looking for your advice, and I understand that I make my own decisions, and the results of those decisions are on me. Please let me know what you thought / concern / advice is.

Also, I guess I have another question: Would I simply have to purchase the HP-25E GPS ACT Version kit, or would I first have to purchase the HP-25E Extended ACT Version and then add the HP-25E GPS ACT Version on top of that?

Thanks, in advance, for any assistance you may have to offer.

smp