To elaberate to Jeffhs question about stylus's...a little easier to provide a link than to explain.
http://www.esotericsound.com/CartStyli.htm
A good source for vintage needles, etc. By the way, that cartridge on the Magnavox/Collaro is a ceramic type made by Electro-Voice. I have a 58' Maggie AM/FM and Turntable and originally it was tracking at 10 grams so I backed it off 2. You would really have to get extensive with anti-skating, etc if you want to track lighter. I did buy a gauge.
http://www.garage-a-records.com/
There is a good site that goes into detail about modifications etc. for the Collaro Conquest Turntable.
http://midimagic.sgc-hosting.com/collaro.htm
This site used to be hosted through Yahoo- Geocities (which no longer exists) so make sure the link above takes you there!