If $$x - \frac{1}{x} = 5, x \neq 0$$, then what is the value of $$\frac{x^6 - 5x^3 - 1}{x^6 + 7x^3 - 1}$$?

A

$$\frac{45}{49}$$

B

$$\frac{45}{41}$$

C

$$\frac{41}{45}$$

D

$$\frac{49}{45}$$