The phrase "although it was technically" is correct and usable in written English.
It can be used to introduce a contrast or exception regarding a technical aspect of a situation or statement.
Example: "Although it was technically possible to complete the project in a week, we decided to take more time to ensure quality."
Alternatives: "even though it was technically" or "despite it being technically".
Although it was, technically, an experimental procedure, Dr. Simon said he did not have to ask his hospital for permission to perform it.
Although it was technically illegal under South Africa's apartheid laws at the time, the college's first class of 34 students was multiracial — something Mr. Gore calls an eye-opener for blacks and whites who had never before worked together.
Although it was technically a much less challenging achievement than carrying humans into orbit, its success was seen as an important step toward opening up space to commercial travel and eventually to tourism.
The setting was Glossop North End in Derbyshire, and although it was technically a friendly, around 1,000 hardy souls made the trip and enjoyed watching several teenagers, who may form next year's youth team, mixing it against a side from the division above - and beating them 2-1.
The game was being played at Exeter's ground, although it was technically a neutral venue as it was chosen back in November.
Although it's technically its own city, South Tucson is surrounded by the city of Tucson.
But although it is technically more accomplished than its predecessors, Majestic the game is not as exciting as Majestic the game premise.
Although it is technically a non-profit institution, its online program had a 41-percent "profit" margin in fiscal year 2011.
And yet, in North Dakota, one insurance provider has near monopolistic dominance, and although it is technically a co-op -- a nonprofit owned by its members -- it hardly serves as an example of best practices.
Although it's technically a ghost story, ghosts aren't what will spook you.
Cricket is calling this a prepaid plan, although it's technically a no-contract plan.
