??? I've made one of these Muntons Bock beer batches before, it was made at room temps, fermented like crazy, but I added quite a bit of corn sugar and the mouth feel is a little thin. Tasted pretty good, just not great.
I was told the rice solids would boost the alcohol in beer without changing the mouth feel or giving it a cidery taste if too much corn sugar was used.
If it tastes great to you, then you should continue to make it.
I only stated that a bock was a lager, and if you're making "bock" any other way it may taste fine to you but it's not a bock. That must be where the recipe is glaringly different than yours- you're making a thin brown ale that munton's calls a "bock". But it's not a bock, because a bock is a full bodied rich malty lager.
Rice solids will certainly boost the alcohol, as will corn sugar. Both will thin and dry the beer. All malt will boost the alcohol, and not thin the body of the beer.
Sorry for the miscommunication. By saying you wanted to make a bock, we all mistakenly assumed you mean bock as in the beer style that we all know as bock. Munton's isn't a bock, and using an ale yeast cannot make a bock. If you want to make a dark brown ale with that kit, you can. And it sounds like you did and liked it- and that's the important thing.
For future reference, here is the definition of a true bock:
5B. Traditional Bock
Aroma: Strong malt aroma, often with moderate amounts of rich melanoidins and/or toasty overtones. Virtually no hop aroma. Some alcohol may be noticeable. Clean. No diacetyl. Low to no fruity esters.
Appearance: Light copper to brown color, often with attractive garnet highlights. Lagering should provide good clarity despite the dark color. Large, creamy, persistent, off-white head.
Flavor: Complex maltiness is dominated by the rich flavors of Munich and Vienna malts, which contribute melanoidins and toasty flavors. Some caramel notes may be present from decoction mashing and a long boil. Hop bitterness is generally only high enough to support the malt flavors, allowing a bit of sweetness to linger into the finish. Well-attenuated, not cloying. Clean, with no esters or diacetyl. No hop flavor. No roasted or burnt character.
Mouthfeel: Medium to medium-full bodied. Moderate to moderately low carbonation. Some alcohol warmth may be found, but should never be hot. Smooth, without harshness or astringency.
Overall Impression: A dark, strong, malty lager beer.
Comments: Decoction mashing and long boiling plays an important part of flavor development, as it enhances the caramel and melanoidin flavor aspects of the malt. Any fruitiness is due to Munich and other specialty malts, not yeast-derived esters developed during fermentation.
History: Originated in the Northern German city of Einbeck, which was a brewing center and popular exporter in the days of the Hanseatic League (14th to 17th century). Recreated in Munich starting in the 17th century. The name bock is based on a corruption of the name Einbeck in the Bavarian dialect, and was thus only used after the beer came to Munich. Bock also means billy-goat in German, and is often used in logos and advertisements.