I also had a chance to take a look again at Thommes Nebula (first view in Jimi's scope) with my 24-inch last weekend and was quite impressed. It was surprisingly easy to pick up at 175x as a fairly faint, round glow <20" diameter. Appeared similar to a small, 14th magnitude galaxy. At 225x, it seemed ~15" diameter with a faint extension to the south or southwest, increasing the size to 25"x15".

If you take a look at this field, you'll immediately notice the reflection nebula RNO 78 just 3' NNW. It appeared moderately bright, fairly small, 20" diameter. A star is at the east edge, barely beyond the glow of RNO 78 and there appeared to be a star embedded in the glow. This little known reflection nebula has a fairly high surface brightness!