Try and tell ryco that their oil filters seal when only "hand tight". Its best to go that bit tighter as this pushes the o-ring in nicely and prevents leaks.
Also just because you hand tightened it when you fitted it doesnt mean it will come off as easily. I have had to many oil filters that I had fitted myself come back in 10,000km and were a struggle to get off even with an oil filter tool and long rachet (due to too many heat cycles and differences in metal compounds between block, oil filter ousing and oil filter)