Complex sentence: With the help of Mr. Manyak, the club members were able to produce three telescopes, although the club performed the most work on their own 8 nch Newtonian which was the second scope to be built at that time.
Split into simpler sentences: With the help of Mr. Manyak, the club members were able to produce three telescopes. The club performed the most work on their own 8 inch Newtonian which was the second scope to be built at that time.