Thanks for the tips re finding n3132. I used two charts to help me navigate:
http://members.optusnet.com.au/~jano...-nav-small.jpg
The top one is an overview with all stars to mag 6.5 and ngc3132 near the top right corner. The bottom one is a zoom-in on target with stars down to mag 10. The circle is 5 degrees in diameter.
Don't have any filters and I'm missing out on the mid range magnifications. I have 7 Ploessls but still nothing between 10 and 20mm. (Andrews was out of stock of 15mm when I ordered the Dob.)