Any one ever heard of this internal style???

[Gwa Sow Chop]

Has any one ever heard of the internal style Sum-I. (Pronounced like sum eeee)

[J]

Sum looks like xin(heart) in cantonese. This would make the system xin yi. This is one of the names of xing yi (ying yi) system. Then, there is a set called xin yi ba (shaolin set). There is a room at the shaolin temple which has the floor depressed in the foot pattern of this form.

J

[Paul Skrypichayko]

Sum Yi means heart/emotion and mind/intent. In mandarin, it is spelled "Xin Yi". This is different from Xing Yi, which is pronounced "ying yi" in cantonese.

I don't know either style, but I do know that they are two different styles.

[Ben Gash]

There's a style related to wuzhuquan called suan yi or syuang nee or even shuang ee dependent on who you hear it from.
It is an internal system, some say a crane system, and again some say it is one of the 5 aspects of wuzhuquan.
It is practiced by the Nanyang association, and various other wuzhuquan and fujian crane groups.