I also own a Tasco but a small 60mm refractor. I have purchased a new eypiece or two for it and it is okay. I bought it used and then found the same reviews that you have found. There are several websites that may help you out..

www.rocketroberts.com/astro/aan.htm

go to the bottom and find the section about tasco fixup. There are others but this is one of the better ones I have found.

Just one thing to remember, don't set your expectations to high and you shouldn't be disappointed. I was overwhelmed when I saw the rings of Saturn, the moons of Jupiter, and a few other objects. I am new to this also so I am just starting out.

bolintx