Ive searched around and found the answer to most of my implant questions except for this one. Can you have more than one of the same type of special implant. For example, If I have 5 end and 5 Luck, can I buy 5 implants of luck to increase my luck to 10? Just using this as an example. Thanks in advance to all who may help.

I have read people saying no. Shame I will need to carry buffout on my sniper char because he isnt strong enough, wish I could buy more, even at a higher cost.

You can only upgrade a stat once. How many stats you can upgrade depends on your Endurance.

Don't forget about taking the perk that will allow you to add a point to your special (I think it is intense training but just read your perks when you level up).

No you can't. I know!