This! 100% this, is my main issue. I can't keep glimmer in my inventory with all the upgrades and having to buy heavy synth. It takes to long to make that glimmer up, even using the consumables. They need to raise the level cap on Glimmer and also either have Xur sell heavy synth again or lower the price on the Gunsmith's or find another non-glimmer option for buying heavy, if we have to spend the large amounts of glimmer on upgrades.