The phrase "a more solid and" is correct and usable in written English.
It can be used when comparing or describing something that is stronger or more reliable than another option.
Example: "We need to develop a more solid and effective strategy to address the challenges we face."
Alternatives: "a firmer and" or "a stronger and".
The backstory of the novel is a more solid and representative tragedy of contemporary China.
A more solid and useful estimate of the comparative safety of the different energy sources comes from the Paul Scherrer Institute in Switzerland, in their 2001 report.
Does it mark instead the launch of a Second Republic, a more solid and perhaps more democratic replacement for the one that lasted from a military coup in 1952 until the overthrow of Hosni Mubarak in 2011?
The other new model the Galaxy 6 isn't so radical, but like the Edge it has a more solid and luxurious feel than its predecessors.
By embedding services from Zuora in his own website, he is able to offer customers a more solid and standardized subscription and billing process.
Since he has been restored alongside Bastian Schweinsteiger, his midfield partner in crime from the 2010 World Cup, in time for the quarter-finals, Germany have looked a more solid and dangerous side.
These post-processing steps can be minimized in direct metal laser sintering (DMLS), in which a high-power laser fuses a fine metal powder into a more-solid and finished part without the use of binder material.
A debriefing session usually follows the game and helps in summarizing the results and in building a more solid knowledge and exposure for future experiences.
I think that theses will help structure the movie and provide a more solid center and end to the film.
Retailers need to invest in IT to create a more solid foundation, and to enable future speed and flexibility.
Mr. Gross and Ms. Cattrall bring a more solid yin and yang to their performances.
